**已关闭。**此问题需要debugging details。当前不接受答案。

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16小时前就关门了。
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[valgrind消息]

==16958== 1 errors in context 1 of 2:
==16958== Invalid read of size 4
==16958==    at 0x109637: arr_del (in /home/students/s/smelov.vp/lab3/lab3)
==16958==    by 0x10939D: main (in /home/students/s/smelov.vp/lab3/lab3)
==16958==  Address 0x4a19938 is 0 bytes after a block of size 24 alloc'd
==16958==    at 0x483E7CF: realloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==16958==    by 0x109541: arr_corr (in /home/students/s/smelov.vp/lab3/lab3)
==16958==    by 0x109323: main (in /home/students/s/smelov.vp/lab3/lab3)

[功能代码]

int main(){
    int input=0;
    int *arr;
    int s;
    size_t index;
    scanf("%d", &input);
    switch(input){
    case 2:
        scanf("%zu", &index);
        arr = arr_corr(arr, index, &s);
        arr_output(arr, s);
        break;

    case 3:
        scanf("%zu", &index);
        arr = arr_del(arr, index, &s);
        arr_output(arr, s);
        break;
    }
}

int* arr_corr(int *arr, size_t index, int *s){
    int n;
    (*s) = (*s)+1;
    arr = (int*) realloc(arr, (size_t)(*s) * sizeof(int));
    for(size_t i = (size_t)((*s)-1); i>=index; i--){
        arr[i+1] = arr[i];
    }
    scanf("%d", &n);
    arr[index]= n;
    return arr;
}

int* arr_del(int *arr, size_t index, int *s){
    for(size_t i=index; i<(size_t)(*s); i++){
        arr[i]=arr[i+1];
    }
    (*s)=(*s)-1;
    arr = (int*) realloc (arr, (size_t)(*s) * sizeof(int));
    return arr;
}

我只是不明白这条信息是什么意思，我做错了什么。请帮帮我！我所知道的一切就是main（）函数和其他任何东西都没有问题。代码位于两个文件中。链接这些文件也没有问题。