#include <stdio.h>

void display(const int r[2][2]);

int
main()
{
    int i,j;
    int r[2][2];

    for (i = 0; i < 2; ++i)
        for (j = 0; j < 2; ++j)
            scanf("%d", &r[i][j]);

    display(r);
    printf("\n");
    return(0);
}
void
display(const int r[2][2])
{
    int i,j;
    for(i = 0; i < 2; ++i)
        for (j = 0; j < 2; ++j)
            printf("%d ", r[i][j]);
}
运行～出现：
a.c: In function ‘main’:
a.c:15: warning: passing argument 1 of ‘display’ from incompatible pointer type
a.c:3: note: expected ‘const int (*)[2]’ but argument is of type ‘int (*)[2]’
为什么～这是 什么意思？

ubuntu下的gcc编译器。。。

当为一维数组时就不会报错 gcc编译器～

当我换位如此写法～
a.c:3: error: ‘type name’ declared as function returning an array
a.c: In function ‘main’:
a.c:15: warning: passing argument 1 of ‘display’ from incompatible pointer type
a.c:3: note: expected ‘int (*)(const int *)’ but argument is of type ‘int (*)[2]’
a.c: At top level:
a.c:21: error: ‘type name’ declared as function returning an array
a.c: In function ‘display’:
a.c:21: error: parameter name omitted
a.c:26: error: ‘r’ undeclared (first use in this function)
a.c:26: error: (Each undeclared identifier is reported only once
a.c:26: error: for each function it appears in.)
是编译器的问题吗？2L貌似运行成功