程序员面试100题(算法)之C/C++实现字符串复制
来源：互联网 发布：云计算应用的发展方向 编辑：程序博客网 时间：2024/05/17 22:52
// StrCopy.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <cstring>#include <iostream>using namespace std;char *StrCopy(char *destStr, const char *srcStr){char *s = NULL;int srcLen = 0;int destLen = 0;if(NULL == srcStr)return NULL;if(NULL != srcStr){srcLen = strlen(srcStr);if(NULL == destStr){destStr = (char*)malloc(sizeof(char) * (srcLen + 1));s = destStr;}else{destLen = strlen(destStr);if(destLen < srcLen){destStr = (char*)malloc(sizeof(char) * (srcLen + 1));}s = destStr;}}while(*srcStr != '\0'){*destStr = *srcStr;destStr++;srcStr++;}*destStr = '\0';return s;}int _tmain(int argc, _TCHAR* argv[]){char *srcStr = "ABCDEFGHIJKLMNOPQ DFHFGJGHJ GFHFGJGH dsg ";char destStr[] = "ABCDEFGHIJKdgdfgPQ DFHFGJGHJ GFHFGJGH dsg dsgdfhfgh";char *dest = NULL;dest = StrCopy(dest, destStr);cout << dest <<endl;return 0;}
