提交记录 #402

编译情况：编译成功

code.c: In function ‘main’:
code.c:27:9: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration]
   27 |         free(result); // 释放动态分配的内存
      |         ^~~~
code.c:27:9: warning: incompatible implicit declaration of built-in function ‘free’
code.c:4:1: note: include ‘<stdlib.h>’ or provide a declaration of ‘free’
    3 | #include <string.h>
  +++ |+#include <stdlib.h>
    4 | 
code.c: In function ‘replaceSubstring’:
code.c:37:23: warning: implicit declaration of function ‘strdup’; did you mean ‘strcmp’? [-Wimplicit-function-declaration]
   37 |     char *pos, *dst = strdup(source); // 复制源字符串以进行修改
      |                       ^~~~~~
      |                       strcmp
code.c:37:23: warning: initialization of ‘char *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]

固定测试点#1:

Runtime Error: - Returning:-11

0.039s

556 kB

固定测试点#2:

Runtime Error: - Returning:-11

0.007s

228 kB

固定测试点#3:

Runtime Error: - Returning:-11

0.009s

236 kB

附加测试点暂不可用

不可用

N/A

52【字符】字符替换*——用指针更方便

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

// 函数声明
char* replaceSubstring(char* source, const char* toReplace, const char* replacement);

int main() {
    char s[101]; // 源串 s，长度<=100
    char t[11];  // 被替换串 t，长度<=10
    char str[11]; // 替换串 str，长度<=10

    // 读取源串 s
    scanf("%100s", s); // 读取字符串，限制长度为100

    // 读取被替换串 t
    scanf("%10s", t); // 读取字符串，限制长度为10

    // 读取替换串 str
    scanf("%10s", str); // 读取字符串，限制长度为10

    // 执行替换
    char* result = replaceSubstring(s, t, str);

    if (result != NULL) {
        printf("%s\n", result); // 输出替换后的字符串
        free(result); // 释放动态分配的内存
    } else {
        printf("替换过程中发生错误。\n");
    }

    return 0;
}

// 字符串替换函数
char* replaceSubstring(char* source, const char* toReplace, const char* replacement) {
    char *pos, *dst = strdup(source); // 复制源字符串以进行修改
    if (!dst) return NULL;

    while ((pos = strstr(dst, toReplace)) != NULL) {
        // 替换字符串
        memmove(pos + strlen(replacement), pos + strlen(toReplace), strlen(pos + strlen(toReplace)) + 1);
        memcpy(pos, replacement, strlen(replacement));
    }

    return dst;
}