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#include <stdio.h>
#include <stdlib.h>
int (*func())[20];//funcÊÇÒ»¸öº¯Êý£¬Ëü·µ»ØÒ»¸öÖ¸Ïò°üÀ¨20¸öintÔªËØµÄÊý×éµÄÖ¸Õë
int main(void)
{
        int (*result)[20];
        int i = 0;
        result = func();
        for(i = 0; i < 20; i++){
                printf("%d\n", (*result)[i]);
        }
        free(result);
        exit(0);
}
int (*func())[20]
{
        int (*a)[20];
        int i = 0;
        a = calloc(20, sizeof(int));
        if(a == NULL){
                perror("calloc error");
                exit(1);
        }
        for(i = 0; i < 20; i++){
                a[0][i] = i;
        }
        return a;
}
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#include <stdio.h>
#include <stdlib.h>
struct tag{
        int array[20];
}x, y;
struct tag func(void);
int main(void)
{
     &n


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struct Foo1
{
   char a;
   int  b;
   char c;
   int  d;
};
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struct Foo2
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