【发布时间】:2014-12-04 07:54:32
【问题描述】:
我目前正在开发一个程序,将十进制输入转换为其十六进制等效值。我计划使用向量系统地收集值,然后将它们反向吐出(因此以十六进制表示)。但是我遇到了很多问题。直到 16 的所有输入都按预期工作,然后事情变得很奇怪。输入 16 会导致系统输出笑脸,输入 18 会导致 2 种不同颜色的笑脸,输入 23 会导致系统发出哔哔声。
这应该是一个相对简单的代码,它只是以我从未见过的方式运行!希望这些信息有帮助
编辑:我知道 std::hex 函数,虽然这是一个类,不幸的是我们不允许使用它。
#include <iostream>
#include <string>
#include <vector>
#include <iomanip>
using namespace std;
int main(){
int input, tester = 0, switchStuff, county = 0, remainderCount = 1, inputCount, remainder = 1, remainderCount2, inputCount2;
string stopGo;
char remainderLetter;
do{
while (tester != 1){
cout << "Enter the number you would like to convert to Hex format: ";
cin >> input;
if (cin.fail()){ //check if user input is valid
cout << "Error: that is not a valid integer.\n";
cin.clear(); cin.ignore(INT_MAX, '\n'); //Clear input buffer
continue; //continue skips to top of loop if user input is invalid, allowing another attempt
}
else{
tester = 1; //Tester variable allows loop to end when good value input
}
}
inputCount = input;
while(inputCount != 0){
remainderCount = inputCount % 16;
inputCount = (inputCount - remainderCount) / 16;
county++;
}
vector<string>userInfo(county);
inputCount2 = input;
for (int i = 0; county > i; i++){
remainderCount2 = inputCount2 % 16;
inputCount2 = (inputCount2 - remainderCount2) / 16;
if (remainderCount2 == 10){
remainderLetter = 'A';
}
else if (remainderCount2 == 11){
remainderLetter = 'B';
}
if (remainderCount2 == 12){
remainderLetter = 'C';
}
else if (remainderCount2 == 13){
remainderLetter = 'D';
}
if (remainderCount2 == 14){
remainderLetter = 'E';
}
else if (remainderCount2 == 15){
remainderLetter = 'F';
}
if (remainderCount2 >= 10){
userInfo[i] = remainderLetter;
}
else{
userInfo[i] = remainderCount2;
}
}
cout << "The result in Hexadecimal format is: ";
for (int i = 0; i < county; i++)
cout << userInfo[i];
cout << endl << "Would you like to continue? (Enter Yes/No): "; //Check whether to continue or not
cin >> stopGo;
cout << endl;
tester = 0;
}while ((stopGo.compare("Yes") == 0) || (stopGo.compare("yes") == 0) || (stopGo.compare("y") == 0) || (stopGo.compare("Y") == 0)); //Leaves user with a range of ways to say 'yes'
cout << "Thank you for using this program!" << endl;
system("pause");
}
【问题讨论】:
-
您知道吗,您可以使用 std::hex 在 std::out 上将任何整数打印为十六进制?
-
也许你会考虑换成这样的:cout
-
没有时间给出完整的答案,但你的代码的最后一部分很糟糕:鉴于
A的 ASCII 码是 65,你可以使用类似remainderLetter=remainderCount2+55;或更好的 @ 987654324@