当我输入 0x123456789 我得到不正确的输出,我不知道为什么。起初我以为这是一个最大可能的 int 值问题,但是我将我的变量更改为 unsigned long 并且问题仍然存在。
#include <iostream>
using namespace std;
long htoi(char s[]);
int main()
{
cout << "Enter Hex \n";
char hexstring[20];
cin >> hexstring;
cout << htoi(hexstring) << "\n";
}
//Converts string to hex
long htoi(char s[])
{
int charsize = 0;
while (s[charsize] != '\0')
{
charsize++;
}
int base = 1;
unsigned long total = 0;
unsigned long multiplier = 1;
for (int i = charsize; i >= 0; i--)
{
if (s[i] == '0' || s[i] == 'x' || s[i] == 'X' || s[i] == '\0')
{
continue;
}
if ( (s[i] >= '0') && (s[i] <= '9') )
{
total = total + ((s[i] - '0') * multiplier);
multiplier = multiplier * 16UL;
continue;
}
if ((s[i] >= 'A') && (s[i] <= 'F'))
{
total = total + ((s[i] - '7') * multiplier); //'7' equals 55 in decimal, while 'A' equals 65
multiplier = multiplier * 16UL;
continue;
}
if ((s[i] >= 'a') && (s[i] <= 'f'))
{
total = total + ((s[i] - 'W') * multiplier); //W equals 87 in decimal, while 'a' equals 97
multiplier = multiplier * 16UL;
continue;
}
}
return total;
}
最佳答案
long
在您的计算机上可能也是 32 位。试试 long long
。
关于c++ - Htoi 10 位数字的输出不正确,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33710769/