pack02.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 30 行

#include "fail.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct _S {
    int a;
    char b[];
} S;

S *foo()
{
    S *p = (S*) malloc( sizeof( int ) + 4 );

    if( sizeof( S ) != sizeof( int ) ) fail(__LINE__);
    p->a = -1;
    p->b[0] = 'a';
    p->b[1] = 'b';
    p->b[2] = 'c';
    p->b[3] = '\0';
    return p;
}

int main()
{
    S *x = foo();
    if( x->a != -1 && strcmp( x->b, "abc" ) != 0 ) fail(__LINE__);
    _PASS;
}