字符串替换

//字符串替换string replace_all_distinct(string&   str, const   string&   old_value, const   string&   new_value){for (string::size_type pos(0); pos != string::npos; pos += new_value.length()) {if ((pos = str.find(old_value, pos)) != string::npos)str.replace(pos, old_value.length(), new_value);    //用new_value替换str中从pos开始（包括0）的old_value.length()个字符的子串else   break;}return  str;}

//字符串替换//int StrReplace(char strRes[], char from[], char to[]) {//int i, flag = 0;//char *p, *q, *ts;//for (i = 0; strRes[i]; ++i) {//if (strRes[i] == from[0]) {//p = strRes + i;                         //p为从替换的第一个字符开始后面所有的字符串，例如you are cute,are换成is，p为are cute////printf(p);//q = from;//while (*q && (*p++ == *q++));//if (*q == '\0') {//ts = (char *)malloc(strlen(strRes) + 1);  //malloc函数用于向操作系统申请内存，声明在stdlib.h中, //  //并将指针转换为char *类型赋值给ts，申请的大小为(strlen(strRes) + 1)。//strcpy(ts, p);                           //字符串复制,p为cute//strRes[i] = '\0';//strcat(strRes, to);                  //字符串链接,strRes为"you ",设strRes[i] = '\0';即是把后面的截断//strcat(strRes, ts);////printf("strRes2%s\n", strRes);//free(ts);//flag = 1;//}//}//}//return flag;//}