C 使用指针更改字符数组的字符

没有那么复杂，我的问题是我不知道如何使用指针更改字符数组的变量

#include "stdio.h"

int main(void) {
// Disable stdout buffering
setvbuf(stdout, NULL, _IONBF, 0);

char a[100], ch, *counter;
int c = 0, i;

counter = a[0];
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter = ch;     //problem is here
    counter = a[c];
    c = c + 1;
}
printf("hi\n");

for(i = c-1; i >= 0; i--){
    printf("%c", a[i]);
}

return 0;
}

错误为“退出时状态为非零”

您需要以下信息

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
    ++c;
}

while ( c != 0 ) printf("%c", a[--c]);

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
}

while ( counter != a ) printf( "%c", *--counter );

或者甚至以下

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
    ++c;
}

while ( c != 0 ) printf("%c", a[--c]);

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
}

while ( counter != a ) printf( "%c", *--counter );

您需要以下内容

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
    ++c;
}

while ( c != 0 ) printf("%c", a[--c]);

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
}

while ( counter != a ) printf( "%c", *--counter );

或者甚至以下

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
    ++c;
}

while ( c != 0 ) printf("%c", a[--c]);

counter = a;
^^^^^^^^^^^
printf("please enter a sentance:");


while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter++ = ch;     //problem is here
}

while ( counter != a ) printf( "%c", *--counter );

---

有三个问题

计数器=a[0]； 您正在将[0]处的值赋给指针。你需要的是这个

计数器=&（a[0]）

或者更好

计数器=a

计数器=a[c] 与第1点相同。您不必这样做，因为计数器已经指向数组。只需增加指针

由于数组的长度为100，所以只能存储99个字符+一个空字符。所以你需要一个柜台。所以用c作为计数器

改变

while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter = ch;     //problem is here
    counter = a[c];
    c = c + 1;
}

到

---

有三个问题

计数器=a[0]； 您正在将[0]处的值赋给指针。你需要的是这个

计数器=&（a[0]）

或者更好

计数器=a

计数器=a[c] 与第1点相同。您不必这样做，因为计数器已经指向数组。只需增加指针

由于数组的长度为100，所以只能存储99个字符+一个空字符。所以你需要一个柜台。所以用c作为计数器

改变

while ((ch = getchar()) != '\n'){
    printf("yo");
    *counter = ch;     //problem is here
    counter = a[c];
    c = c + 1;
}

到

---

行

计数器是否=a[0]编译时抛出错误？
计数器=a[0]-->
计数器=&a[0]或<代码>计数器=a，
计数器=a[c]-->
计数器++行<代码>计数器=a[0]编译时抛出错误？
计数器=a[0]-->
计数器=&a[0]或<代码>计数器=a，
计数器=a[c]-->
计数器++