在c++中int转十六进制八进制二进制字符串

来源：互联网发布：linux查看历史命令编辑：程序博客网时间：2024/04/30 19:13

仿java源码，代码如下

#include <iostream>char digits[]={'0', '1', '2', '3', '4', '5','6', '7', '8', '9', 'a', 'b','c', 'd', 'e', 'f', 'g', 'h','i', 'j', 'k', 'l', 'm', 'n','o', 'p', 'q', 'r', 's', 't','u', 'v', 'w', 'x', 'y', 'z'};std::string ToUnsignedString(int i, int shift){char  buf[32];char * pBuf = buf;int charPos = 32;int radix = 1<<shift;int mask = radix - 1;do{pBuf[--charPos] = digits[i&mask];i = i>>shift; }while(i != 0);std::string str;int strLen = 32 - charPos;pBuf = pBuf+charPos;while(strLen){str.push_back(*pBuf);pBuf++;strLen--;}return str;}std::string ToHexString(int i){return ToUnsignedString(i, 4);}std::string ToOctalString(int i){returnToUnsignedString(i, 3);}std::string ToBinaryString(int i){returnToUnsignedString(i, 1);}int main(){std::cout<<ToHexString(200).c_str()<<std::endl;std::cout<<ToOctalString(200).c_str()<<std::endl;std::cout<<ToBinaryString(200).c_str()<<std::endl;return 0;}

结果如下：

310

11001000