c++字符串全局替换特定字符串实现代码

以下是 C 语言实现字符串全局替换特定字符串的代码：

#include <stdio.h>
#include <string.h>

void replace(char *str, char *old, char *new) {
    char buffer[1024];
    char *p;

    while ((p = strstr(str, old)) != NULL) {
        strncpy(buffer, str, p - str);
        buffer[p - str] = '\0';
        strcat(buffer, new);
        strcat(buffer, p + strlen(old));
        strcpy(str, buffer);
    }
}

int main() {
    char str[] = "hello world, hello CSDN!";
    char old[] = "hello";
    char new[] = "hi";

    replace(str, old, new);

    printf("%s\n", str);

    return 0;
}

以上代码可以将字符串中所有的特定字符串替换为新的字符串。