运行不出来(指针问题)

题目为2.编写整理字符串的函数char*deleteChSet(char s1, chars2）删除字符串s1中所有在字符串s2中出现的字符。函数返回字符串s1。以下是我的代码

基于Monster 组和GPT的调写：

修改如下：

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

char* deleteChSet(char* s1, const char* s2) {
    int i = 0, j;
    char* p = s1;
    while (*p != '\0') {
        if (strchr(s2, *p) == NULL) {
            s1[i++] = *p;
        }
        p++;
    }
    s1[i] = '\0';
    return s1;
}

int main() {
    char s1[100], s2[100];
    printf("请输入s1字符串：");
    fgets(s1, sizeof(s1), stdin);
    s1[strcspn(s1, "\n")] = '\0';

    printf("请输入s2字符串：");
    fgets(s2, sizeof(s2), stdin);
    s2[strcspn(s2, "\n")] = '\0';

    printf("删除s1中含有s2的字符：%s\n", deleteChSet(s1, s2));
    return 0;
}