提交记录 #400

编译情况：编译成功

code.c: In function ‘replace’:
code.c:10:15: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration]
   10 |     char *k = malloc(a + 1); // 分配足够的空间以存储结果字符串
      |               ^~~~~~
code.c:10:15: warning: incompatible implicit declaration of built-in function ‘malloc’
code.c:4:1: note: include ‘<stdlib.h>’ or provide a declaration of ‘malloc’
    3 | #include <string.h>
  +++ |+#include <stdlib.h>
    4 | 
code.c:36:5: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration]
   36 |     free(k); // 释放k分配的内存
      |     ^~~~
code.c:36:5: warning: incompatible implicit declaration of built-in function ‘free’
code.c:36:5: note: include ‘<stdlib.h>’ or provide a declaration of ‘free’
code.c:8:9: warning: unused variable ‘c’ [-Wunused-variable]
    8 |     int c = strlen(str);
      |         ^

固定测试点#1:

Wrong Answer

0.001s

232 kB

固定测试点#2:

Runtime Error: malloc(): corrupted top size - Returning:-6

0.001s

496 kB

固定测试点#3:

Runtime Error: malloc(): corrupted top size - Returning:-6

0.000s

228 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>

void replace(char *s, char *t, char *str) {
    int a = strlen(s);
    int b = strlen(t);
    int c = strlen(str);
    char *p = s;
    char *k = malloc(a + 1); // 分配足够的空间以存储结果字符串
    if (k == NULL) {
        // 处理内存分配失败的情况
        return;
    }
    k[0] = '\0'; // 初始化k为空字符串

    while (*p != '\0') {
        char *q = p;
        int i = 0;
        while (*q != '\0' && *t != '\0' && *q == *t) {
            q++;
            t++;
            i++;
        }
        if (*t == '\0' && i == b) {
            strcat(k, str); // 如果找到匹配的子串t，追加str到k
            p += i; // 移动p到t的末尾
            t = t - i + b; // 重置t指针
        } else {
            strcat(k, p); // 追加不匹配的部分到k
            p++; // 移动p指针
        }
        t = t - i; // 重置t指针
    }
    strcpy(s, k); // 将k的内容复制回s
    free(k); // 释放k分配的内存
}

int main() {
    char s[100];
    char t[100]; // 增加t的大小以避免潜在的溢出
    char str[100]; // 增加str的大小以避免潜在的溢出
    fgets(s, sizeof(s), stdin);
    int a = strlen(s);
    if (a > 0 && s[a-1] == '\n') {
        s[a-1] = '\0';
    }
    fgets(t, sizeof(t), stdin);
    int b = strlen(t);
    if (b > 0 && t[b-1] == '\n') {
        t[b-1] = '\0';
    }
    fgets(str, sizeof(str), stdin);
    int c = strlen(str);
    if (c > 0 && str[c-1] == '\n') {
        str[c-1] = '\0';
    }
    replace(s, t, str);
    printf("%s\n", s);
    return 0;
}