C语言中的连续字符串替换

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

void replaceAll(char *str, const char *oldSubstr, const char *newSubstr) {
    char buffer[1000];
    char *ch;

    // Copy the string into buffer
    strcpy(buffer, str);

    // Replace all occurrences of the old substring with the new substring
    while ((ch = strstr(buffer, oldSubstr))) {
        memmove(ch + strlen(newSubstr), ch + strlen(oldSubstr), strlen(ch + strlen(oldSubstr)) + 1);
        memcpy(ch, newSubstr, strlen(newSubstr));
    }

    // Copy the modified string back to the original string
    strcpy(str, buffer);
}

int main() {
    char str[] = "Hello world, world!";
    const char *oldSubstr = "world";
    const char *newSubstr = "universe";

    printf("Original string: %s\n", str);
    replaceAll(str, oldSubstr, newSubstr);
    printf("Modified string: %s\n", str);

    return 0;
}

char *buffer = (char *)malloc(strlen(str) + 1);
if (buffer == NULL) {
    // Handle memory allocation failure
}
strcpy(buffer, str);
// Perform replacements
strcpy(str, buffer);
free(buffer);