字符串逆置

重视思想和理解原理

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#include <iostream> #include <cstdlib> #include <cstring> using namespace std;   char* reverseStr(char * str, char * dest, int len) {     //指向最后一个字符     char * s= &str[len-1];     char *d = dest;       while(len >= 0)     {         *dest++ = *s--;         len--;     }       return d; }   int main() {     char * str = "hello world";     int len = strlen(str);     char *dest = (char *)malloc(sizeof(char)*len);       char* d = reverseStr(str, dest, len);       cout<<"d==="<<d<<endl;     return 0; }