Qt制作进制转换器

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Qt制作进制转换器

前言

Qt制作一个进制转换器分享给大家，有了这个转换器,平时学习遇到进制转换的问题，我们就可以偷懒了~

功能概述

①支持二进制、八进制、十进制、十六进制之间互相转换

②支持浮点数转换以及负数转换

③错误提示，不正确的数值格式，会弹窗警告

④自动去除无效0，最终结果简洁清晰，且可复制

核心思路

利用数据结构中的栈和队列，然后了解各进制之间转换过程即可

整数部分

例如10进制转2进制，就是“除2取余，反向输出”，将每次除2的余数入栈，直至除尽，然后依次出栈就是2进制结果，10转8,16也是同样的原理，注意10转16要输出根据余数10~15输出A~F

2转10就是整数部分从右往左依次将该位上的数值乘2的次方(0开始依次递增),最终的和就是10进制结果,2转8，16也是同样的原理，就是2的次方变成8,16的次方

8转2，整数部分，从右往左，每位直接转换成3位2进制，不足3位，左边补0，8转了2后，拿2进制转10和16就是上面的原理

16转2，整数部分，从右往左，每位直接转换成4位2进制，不足4位，左边补0，16转了2后，拿2进制转10和8就是上面的原理

小数部分

10转2，“乘2取整，顺序输出”，将每次乘2的整数部分入队列，不一定能除尽，所以这里我保留10位小数，最后依次出队就是2进制结果，10转8,16也是同样的原理，“乘8/16取整，顺序输出”

2转10就是小数部分从左往右依次将该位上的数值乘2的次方(-1开始依次递减),最终的和就是10进制结果,2转8，16也是同样的原理，就是2的次方变成8,16的次方

8转2，小数部分，从左往右，每位直接转换成3位2进制，不足3位，右边补0，8转了2后，拿2进制转10和16就是上面的原理

16转2，小数部分，从左往右，每位直接转换成4位2进制，不足4位，右边补0，16转了2后，拿2进制转10和8就是上面的原理

最终将整数部分和小数部分拼接就是最终的结果

项目演示 软件图标

软件界面 进制转换  小数部分保留10位小数

 

  错误提示

 源代码 #include <QWidget> #include<QStack> #include<QQueue> #include<QDebug> #include<qmath.h> #include<QMessageBox> QT_BEGIN_NAMESPACE namespace Ui { class Widget; } QT_END_NAMESPACE class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = nullptr); ~Widget(); void two_transition(QString texts); void eight_transition(QString texts); void ten_transition(QString texts); void sixteen_transition(QString texts); int twoToeight(QString str); int twoTosixteen(QString str); QString eightTotwo(int num); QString sixteenTotwo(int num); QString delete_zero(QString ret); void error_tip(); private slots: void on_btn_transition_clicked(); void on_radio_2_clicked(); void on_radio_8_clicked(); void on_radio_10_clicked(); void on_radio_16_clicked(); private: Ui::Widget *ui; int system_flag = 2;//进制变量 bool is_minus = false; //判断是否为负数 bool is_float = false;//判断是否带小数 }; #include "widget.h" #include "ui_widget.h" Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); this->setWindowTitle("进制转换器"); this->setFixedSize(QSize(this->width(),this->height())); } Widget::~Widget() { delete ui; } void Widget::two_transition(QString texts) //二进制 { QStack<int> stack; QQueue<int> queue; QString text = texts; //整数部分 QString f_text; //小数部分 if(is_float)//如果是小数，整数部分和小数部分分开计算 { text = texts.section(".",0,0); f_text = texts.section(".",1,1); } //转二进制 QString text2 = text; if(is_minus) text2 = "-"+text2; if(is_float) text2 = text2 + "."+ f_text; text2 = delete_zero(text2); ui->le_2->setText(text2); //转八进制 QString text_clone = text; //拷贝 int len = text_clone.length(); while(len) { if(len<3)//若当前位数小于3位，则补0 { while(len!=3) { text_clone = "0" + text_clone; len = text_clone.length(); } } QString temp = text_clone.mid(len-3,3); int tem_len = temp.length(); int num = twoToeight(temp); stack.push(num); //入栈 text_clone.remove(len-tem_len,tem_len);//更新字符串 len = text_clone.length(); } QString num8;//整数部分 QString f_num8;//小数部分 while(!stack.empty()) { QString str = QString::number(stack.pop()); num8 += str; } if(is_float) //处理小数 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); if(len<3) //长度小于3后位补0 { while(len!=3) { f_text_clone += "0"; len = f_text_clone.length(); } } while(len) { QString temp = f_text_clone.mid(0,3); if(temp.length()<3) { while(temp.length()!=3) { temp += "0"; } } int res = twoToeight(temp); queue.enqueue(res); f_text_clone.remove(0,3); len = f_text_clone.length(); } while(!queue.empty()) { QString ret = QString::number(queue.dequeue());//出队 f_num8 += ret; } } if(is_minus) num8 = "-"+num8; if(is_float) num8 = num8 + "." +f_num8; num8 = delete_zero(num8); ui->le_8->setText(num8); //转十进制 QString text_clone1 = text; //拷贝 int sum = 0; double f_sum = 0; //小数部分和 int len1 = text_clone1.length(); for(int i = len1 - 1,k = 0;i>=0;i--,k++) { QString n = text_clone1.at(i); int num = n.toInt(); int p = num * qPow(2,k); sum = sum + p; } if(is_float) //处理小数 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); for(int i = 0,k = -1;i<len;i++,k--) { QString num = f_text_clone.at(i); double ret = num.toDouble(); double df = ret * qPow(2,k); f_sum+=df; } //去除头部的0. QString t_f_sum = QString::number(f_sum).section(".",1,1); f_sum = t_f_sum.toDouble(); } QString temp_sum = QString::number(sum); if(is_minus) temp_sum = "-" + temp_sum; if(is_float) temp_sum = temp_sum + "." + QString::number(f_sum); temp_sum = delete_zero(temp_sum); ui->le_10->setText(temp_sum); //转十六进制 QString text_clone2 = text; //拷贝 int len2 = text_clone2.length(); while(len2) { if(len2<4)//若当前位数小于4位，则补0 { while(len2!=4) { text_clone2 = "0" + text_clone2; len2 = text_clone2.length(); } } QString temp = text_clone2.mid(len2-4,4); int tem_len = temp.length(); int num = twoTosixteen(temp); stack.push(num); //入栈 text_clone2.remove(len2-tem_len,tem_len);//更新字符串 len2 = text_clone2.length(); } QString num16; QString f_num16; while(!stack.empty()) { QString n = QString::number(stack.pop()); if(n=="10") num16 += "A"; else if(n=="11") num16 += "B"; else if(n=="12") num16 += "C"; else if(n=="13") num16 += "D"; else if(n=="14") num16 += "E"; else if(n=="15") num16 += "F"; else num16 += n; } if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); if(len<4) //长度小于4后位补0 { while(len!=4) { f_text_clone += "0"; len = f_text_clone.length(); } } while(len) { QString temp = f_text_clone.mid(0,4); if(temp.length()<4) { while(temp.length()!=4) { temp += "0"; } } int res = twoTosixteen(temp); queue.enqueue(res); f_text_clone.remove(0,4); len = f_text_clone.length(); } while(!queue.empty()) { QString ret = QString::number(queue.dequeue());//出队 if(ret=="10") f_num16 += "A"; else if(ret=="11") f_num16 += "B"; else if(ret=="12") f_num16 += "C"; else if(ret=="13") f_num16 += "D"; else if(ret=="14") f_num16 += "E"; else if(ret=="15") f_num16 += "F"; else f_num16 += ret; } } if(is_minus) num16 = "-"+num16; if(is_float) num16 = num16 + "." + f_num16; num16 = delete_zero(num16); ui->le_16->setText(num16); } void Widget::eight_transition(QString texts)//八进制 { QStack<int> stack; QQueue<int> queue; QString text = texts; QString f_text; //小数部分 if(is_float)//如果是小数，整数部分和小数部分分开计算 { text = texts.section(".",0,0); f_text = texts.section(".",1,1); } //转二进制 QStack<QString> qstr_stack; QString text_clone = text; //拷贝 int len = text_clone.length(); for(int i = len - 1;i>=0;i--) { QString str = text_clone.at(i); int num = str.toInt(); QString res = eightTotwo(num); qstr_stack.push(res); } QString num2; QString f_num2; while(!qstr_stack.empty()) { QString tem = qstr_stack.pop(); num2 += tem; } if(is_float)//处理小数 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); for(int i = 0;i<len;i++) { QString ret = f_text_clone.at(i); int num = ret.toInt(); QString str = eightTotwo(num); f_num2 += str; } } QString num3 = num2; if(is_minus) num2 = "-"+num2; if(is_float) num2 = num2 + "." +f_num2; num2 = delete_zero(num2); ui->le_2->setText(num2); //转八进制 QString tem_text = text; if(is_minus) tem_text = "-"+tem_text; if(is_float) tem_text = tem_text + "." + f_text; tem_text = delete_zero(tem_text); ui->le_8->setText(tem_text); //转十进制 QString text_clone2 = text; //拷贝 int len2 = text_clone2.length(); int sum = 0; double f_sum = 0; for(int i = len2 - 1,k = 0;i>=0;i--,k++) { QString str = text_clone2.at(i); int num = str.toInt(); int p = num * qPow(8,k); sum += p; } if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); for(int i = 0,k = -1;i<len;i++,k--) { QString num = f_text_clone.at(i); double ret = num.toDouble(); double df = ret * qPow(8,k); f_sum+=df; } //去除头部的0. QString t_f_sum = QString::number(f_sum).section(".",1,1); f_sum = t_f_sum.toDouble(); } QString tem_sum = QString::number(sum); if(is_minus) tem_sum = "-" + tem_sum; if(is_float) tem_sum = tem_sum + "." + QString::number(f_sum); tem_sum = delete_zero(tem_sum); ui->le_10->setText(tem_sum); //转十六 QString text_clone3 = num3; //拷贝 int len3 = text_clone3.length(); while(len3) { if(len3<4)//若当前位数小于4位，则补0 { while(len3!=4) { text_clone3 = "0" + text_clone3; len3 = text_clone3.length(); } } QString temp = text_clone3.mid(len3-4,4); int tem_len = temp.length(); int num = twoTosixteen(temp); stack.push(num); //入栈 text_clone3.remove(len3-tem_len,tem_len);//更新字符串 len3 = text_clone3.length(); } QString num16; QString f_num16; while(!stack.empty()) { QString n = QString::number(stack.pop()); if(n=="10") num16 += "A"; else if(n=="11") num16 += "B"; else if(n=="12") num16 += "C"; else if(n=="13") num16 += "D"; else if(n=="14") num16 += "E"; else if(n=="15") num16 += "F"; else num16 += n; } if(is_float)//处理小数部分 { QString f_text_clone = f_num2;//拷贝 int len = f_text_clone.length(); if(len<4) //长度小于4后位补0 { while(len!=4) { f_text_clone += "0"; len = f_text_clone.length(); } } while(len) { QString temp = f_text_clone.mid(0,4); if(temp.length()<4) { while(temp.length()!=4) { temp += "0"; } } int res = twoTosixteen(temp); queue.enqueue(res); f_text_clone.remove(0,4); len = f_text_clone.length(); } while(!queue.empty()) { QString ret = QString::number(queue.dequeue());//出队 if(ret=="10") f_num16 += "A"; else if(ret=="11") f_num16 += "B"; else if(ret=="12") f_num16 += "C"; else if(ret=="13") f_num16 += "D"; else if(ret=="14") f_num16 += "E"; else if(ret=="15") f_num16 += "F"; else f_num16 += ret; } } if(is_minus) num16="-"+num16; if(is_float) num16 = num16 +"." +f_num16; num16 = delete_zero(num16); ui->le_16->setText(num16); } void Widget::ten_transition(QString texts) //十进制 { QStack<int> stack; QQueue<int> queue; QString text = texts; QString f_text; //小数部分 if(is_float)//如果是小数，整数部分和小数部分分开计算 { text = texts.section(".",0,0); f_text = texts.section(".",1,1); } //转二进制 int num = text.toInt(); while(num) { int temp = num%2; stack.push(temp);//余数入栈 num = num/2; } QString str; QString f_str; int count = 0;//计数器(保留10位小数) while(!stack.empty()) { QString n = QString::number(stack.pop()); str += n; } if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); f_text_clone = "0."+f_text_clone; double num = f_text_clone.toDouble(); double ret = num; while(ret&&count!=10) { ret = ret*2; if(ret>=1) { queue.enqueue(1); ret -= 1; } else { queue.enqueue(0); } count++; } while (!queue.empty()) { QString s = QString::number(queue.dequeue()); f_str += s; } } if(is_minus) str = "-"+str; if(is_float) str = str + "." +f_str; str = delete_zero(str); ui->le_2->setText(str); //转八进制 int num8 = text.toInt(); while(num8) { int temp = num8%8; stack.push(temp);//余数入栈 num8 = num8/8; } QString str8; QString f_str8;//小数部分 count = 0;//计数器清0 while(!stack.empty()) { QString n = QString::number(stack.pop()); str8 += n; } if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); f_text_clone = "0."+f_text_clone; double num = f_text_clone.toDouble(); double ret = num; while(ret&&count!=10) { ret = ret*8; if(ret>=1) { QString tem = QString::number(ret); int rs = tem.section(".",0,0).toInt(); ret -= rs; queue.enqueue(rs); } else { queue.enqueue(0); } count++; } while (!queue.empty()) { QString s = QString::number(queue.dequeue()); f_str8 += s; } } if(is_minus) str8 = "-"+str8; if(is_float) str8 = str8 +"."+f_str8; str8 = delete_zero(str8); ui->le_8->setText(str8); //转十进制 QString tem_t = text; if(is_minus) tem_t = "-"+tem_t; if(is_float) tem_t = tem_t +"."+ f_text; tem_t = delete_zero(tem_t); ui->le_10->setText(tem_t); //转十六 int num16 = text.toInt(); while(num16) { int temp = num16%16; stack.push(temp);//余数入栈 num16 = num16/16; } QString str16; QString f_str16;//小数部分 count = 0;//计数器清0 while(!stack.empty()) { QString n = QString::number(stack.pop()); if(n=="10") str16 += "A"; else if(n=="11") str16 += "B"; else if(n=="12") str16 += "C"; else if(n=="13") str16 += "D"; else if(n=="14") str16 += "E"; else if(n=="15") str16 += "F"; else str16 += n; } if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); f_text_clone = "0."+f_text_clone; double num = f_text_clone.toDouble(); double ret = num; while(ret&&count!=10) { ret = ret*16; if(ret>=1) { QString tem = QString::number(ret); int rs = tem.section(".",0,0).toInt(); ret -= rs; queue.enqueue(rs); } else { queue.enqueue(0); } count++; } while (!queue.empty()) { QString n = QString::number(queue.dequeue()); if(n=="10") f_str16 += "A"; else if(n=="11") f_str16 += "B"; else if(n=="12") f_str16 += "C"; else if(n=="13") f_str16 += "D"; else if(n=="14") f_str16 += "E"; else if(n=="15") f_str16 += "F"; else f_str16 += n; } } if(is_minus) str16 = "-" + str16; if(is_float) str16 = str16 +"."+f_str16; str16 = delete_zero(str16); ui->le_16->setText(str16); } void Widget::sixteen_transition(QString texts)//十六进制 { QStack<int> stack; QQueue<int> queue; QStack<QString> qstr_stack; QQueue<QString> qstr_queue; QString text = texts; QString f_text; if(is_float)//如果是小数，整数部分和小数部分分开计算 { text = texts.section(".",0,0); f_text = texts.section(".",1,1); } //转二进制 QString text_clone = text; int len = text_clone.length(); for(int i = len-1;i>=0;i--) { int num; QString str = text_clone.at(i); if(str=="A"||str=="a") num=65; else if(str=="B"||str=="b") num=66; else if(str=="C"||str=="c") num=67; else if(str=="D"||str=="d") num=68; else if(str=="E"||str=="e") num=69; else if(str=="F"||str=="f") num=70; else num = str.toInt(); QString res = sixteenTotwo(num); qstr_stack.push(res); } QString num2; QString f_num2; while(!qstr_stack.empty()) { QString str = qstr_stack.pop(); num2 += str; } QString num3 = num2; if(is_float)//处理小数部分 { QString f_text_clone = f_text;//拷贝 int len = f_text_clone.length(); for(int i = 0;i<len;i++) { QString ret = f_text_clone.at(i); int num =ret.toInt(); QString res = sixteenTotwo(num); qstr_queue.enqueue(res); } while(!qstr_queue.empty()) { QString s = qstr_queue.dequeue(); f_num2 += s; } } if(is_minus) num2 = "-"+num2; if(is_float) num2 = num2 +"."+f_num2; num2 = delete_zero(num2); ui->le_2->setText(num2); //转八进制 QString text_clone1 = num3; //拷贝 int len1 = text_clone1.length(); while(len1) { if(len1<3)//若当前位数小于3位，则补0 { while(len1!=3) { text_clone1 = "0" + text_clone1; len1 = text_clone1.length(); } } QString temp = text_clone1.mid(len1-3,3); int tem_len = temp.length(); int num = twoToeight(temp); stack.push(num); //入栈 text_clone1.remove(len1-tem_len,tem_len);//更新字符串 len1 = text_clone1.length(); } QString num8; QString f_num8; while(!stack.empty()) { QString str = QString::number(stack.pop()); num8 += str; } if(is_float) //处理小数 { QString f_text_clone = f_num2;//拷贝 int len = f_text_clone.length(); if(len<3) //长度小于3后位补0 { while(len!=3) { f_text_clone += "0"; len = f_text_clone.length(); } } while(len) { QString temp = f_text_clone.mid(0,3); if(temp.length()<3) { while(temp.length()!=3) { temp += "0"; } } int res = twoToeight(temp); queue.enqueue(res); f_text_clone.remove(0,3); len = f_text_clone.length(); } while(!queue.empty()) { QString ret = QString::number(queue.dequeue());//出队 f_num8 += ret; } } if(is_minus) num8 = "-"+num8; if(is_float) num8 = num8+"."+f_num8; num8 = delete_zero(num8); ui->le_8->setText(num8); //转十进制 QString text_clone2 = num3; //拷贝 int sum = 0; double f_sum = 0; int len2 = text_clone2.length(); for(int i = len2 - 1,k = 0;i>=0;i--,k++) { QString n = text_clone2.at(i); int num = n.toInt(); int p = num * qPow(2,k); sum = sum + p; } if(is_float) //处理小数 { QString f_text_clone = f_num2;//拷贝 int len = f_text_clone.length(); for(int i = 0,k = -1;i<len;i++,k--) { QString num = f_text_clone.at(i); double ret = num.toDouble(); double df = ret * qPow(2,k); f_sum+=df; } //去除头部的0. QString t_f_sum = QString::number(f_sum).section(".",1,1); f_sum = t_f_sum.toDouble(); } QString tem_sum = QString::number(sum); if(is_minus) tem_sum = "-"+tem_sum; if(is_float) tem_sum = tem_sum +"." +QString::number(f_sum); tem_sum = delete_zero(tem_sum); ui->le_10->setText(tem_sum); //转十六进制 QString t_text = text; if(is_minus) t_text = "-"+t_text; if(is_float) t_text = t_text+"."+f_text; t_text = delete_zero(t_text); ui->le_16->setText(t_text); } int Widget::twoToeight(QString str) //2转8 { if(str == "000") return 0; else if(str == "001") return 1; else if(str == "010") return 2; else if(str == "011") return 3; else if(str == "100") return 4; else if(str == "101") return 5; else if(str == "110") return 6; else if(str == "111") return 7; } int Widget::twoTosixteen(QString str)//2转16 { if(str == "0000") return 0; else if(str == "0001") return 1; else if(str == "0010") return 2; else if(str == "0011") return 3; else if(str == "0100") return 4; else if(str == "0101") return 5; else if(str == "0110") return 6; else if(str == "0111") return 7; else if(str == "1000") return 8; else if(str == "1001") return 9; else if(str == "1010") return 10; else if(str == "1011") return 11; else if(str == "1100") return 12; else if(str == "1101") return 13; else if(str == "1110") return 14; else if(str == "1111") return 15; } QString Widget::eightTotwo(int num)//8转2 { switch(num) { case 0:return "000"; case 1:return "001"; case 2:return "010"; case 3:return "011"; case 4:return "100"; case 5:return "101"; case 6:return "110"; case 7:return "111"; default:return 0; } } QString Widget::sixteenTotwo(int num)//16转2 { switch (num) { case 0:return "0000"; case 1:return "0001"; case 2:return "0010"; case 3:return "0011"; case 4:return "0100"; case 5:return "0101"; case 6:return "0110"; case 7:return "0111"; case 8:return "1000"; case 9:return "1001"; case 65:return "1010"; case 66:return "1011"; case 67:return "1100"; case 68:return "1101"; case 69:return "1110"; case 70:return "1111"; default:return 0; } } QString Widget::delete_zero(QString ret) { //无效无用0 QString str = ret; //删除头部无效0 QString s = str.at(0); while(s=="0") { str.remove(0,1); s = str.at(0); } return str; } void Widget::error_tip() { QMessageBox::warning(this,"警告","输入数值格式不正确,不支持转换!"); } void Widget::on_btn_transition_clicked()//转换 { //获取用户输入 QString texts = ui->le_cin->text(); int len = texts.length(); if(texts.at(0)=="-") //判断是否为负数 { is_minus = true; texts = texts.remove(0,1); } else is_minus = false; if(texts.contains("."))//判断是否带小数 { is_float = true; } else is_float = false; switch (system_flag) { case 2: { for(int i = 0;i<len;i++) { QString str = texts.at(i); if(str=="0"||str=="1"||str==".") continue; else { error_tip(); return; } } two_transition(texts); } break; case 8: { for(int i = 0;i<len;i++) { QString str = texts.at(i); if(str=="0"||str=="1"||str=="2"||str=="3"||str=="4"||str=="5"||str=="6"||str=="7"||str==".") continue; else { error_tip(); return; } } eight_transition(texts); } break; case 10: { for(int i = 0;i<len;i++) { QString str = texts.at(i); if(str=="0"||str=="1"||str=="2"||str=="3"||str=="4"||str=="5"||str=="6"||str=="7"|| str=="8"||str=="9"||str==".") continue; else { error_tip(); return; } } ten_transition(texts); } break; case 16: { if(is_float) { QString f_text = texts.section(".",-1,-1); for(int i = 0;i<f_text.length();i++) { QString str = f_text.at(i); if(str=="0"||str=="1"||str=="2"||str=="3"||str=="4"||str=="5"||str=="6"||str=="7"|| str=="8"||str=="9") continue; else { error_tip(); return; } } } for(int i = 0;i<len;i++) { QString str = texts.at(i); if(str=="0"||str=="1"||str=="2"||str=="3"||str=="4"||str=="5"||str=="6"||str=="7"|| str=="8"||str=="9"||str=="."||str=="A"||str=="B"||str=="C"||str=="D"||str=="E"||str=="F"|| str=="a"||str=="b"||str=="c"||str=="d"||str=="e"||str=="f") continue; else { error_tip(); return; } } sixteen_transition(texts); } break; default: return; } void Widget::on_radio_2_clicked() { system_flag = 2; } void Widget::on_radio_8_clicked() { system_flag = 8; } void Widget::on_radio_10_clicked() { system_flag = 10; } void Widget::on_radio_16_clicked() { system_flag = 16; }

 项目源码:github/17359830697/system_transition

有了这个，再也不怕进制转换了~

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点赞收藏关注就是对我最大的支持~

本文标签： 转换器QT