ch08_13.c

在文件中含有大量基础C program code以公初学者参考

#include <stdio.h>
union memory
{
    int a;
    char b;
    int c[4];
};
int main(void)
{    
    union memory testData;
    printf("size of testData :%d\n", sizeof(testData));
    printf("size of testData.a :%d\n", sizeof(testData.a));
    printf("size of testData.b :%d\n", sizeof(testData.b));
    printf("size of testData.c :%d\n", sizeof(testData.c));
    printf("----------------------\n");
    testData.a = 0x4533;
    printf("testData.a=%04x\n", testData.a);
    printf("testData.a