c - 仅在 eclipse 中出现此错误 "not a structure or union"

Question

我只在 Eclipse 中收到此错误。我的代码在其他编译器中运行没有任何错误
这是我在 ECLIPSE 中遇到的错误

 21:20:16 **** Incremental Build of configuration Debug for project Sieve of Eratosthenes ****
Info: Internal Builder is used for build
gcc -O0 -g3 -Wall -c -fmessage-length=0 -o "src\\Sieve of Eratosthenes.o" "..\\src\\Sieve of Eratosthenes.c" 
..\src\Sieve of Eratosthenes.c: In function 'main':
..\src\Sieve of Eratosthenes.c:16:15: error: request for member 'number' in something not a structure or union
   *(pri+(i-2)).number=i;
               ^
..\src\Sieve of Eratosthenes.c:17:15: error: request for member 'value' in something not a structure or union
   *(pri+(i-2)).value =1;
               ^
..\src\Sieve of Eratosthenes.c:20:23: error: request for member 'number' in something not a structure or union
   printf("%d",*(pri+i).number);
                       ^
..\src\Sieve of Eratosthenes.c:21:23: error: request for member 'value' in something not a structure or union
   printf("%d",*(pri+i).value);
                       ^

21:20:16 Build Failed. 4 errors, 0 warnings. (took 107ms)

我尝试在“https://www.onlinegdb.com/online_c_compiler”中运行我的代码，效果很好

#include <stdio.h>
#include <stdlib.h>

struct prime {

        int number;
        int value;
    };

int main() {
    int n;
    printf("enter range");
    scanf("%d",&n);
    struct prime pri[n-2];
    for(int i=2;i<=n;i++){
        pri[i-2].number=i;
        pri[i-2].value =1;
    }
    for(int i=0 ;i<=n-2;i++){
        printf("%d ",pri[i].number);
    }

}

Answer 1

您面临的问题与 Eclipse 无关，而是与您在不同平台上使用的代码似乎不同这一事实有关。

*(pri+i).number

和

pri[i].number

不一样。

. 具有更高的 precedence ，因此它比 * 结合得更紧。

要使第一个版本起作用:

(*(pri+i)).number