得出自己当前系统指定类型的大小

注意：
因为C语言定义了char类型是1字节，所以char类型的大小一定是1字节，所以在char类型为16位，double类型为64位的系统中，sizeof给出的double就会是4字节。
sizeof()返回值的单位是字节！！

我的设备信息：

代码如下：C Project

#include 
#include 

int main()
{

     //字符型归于整形
    printf("nn");
    printf("     //字符型归于整形n");
    printf("tsizeof(short)：%dn",sizeof(short));
    printf("tsizeof(int)：%dn",sizeof(int));
    printf("tsizeof(long)：%dn",sizeof(long));
    printf("tsizeof(long long)：%dn",sizeof(long long));
    printf("tsizeof(char)：%dn",sizeof(char));

    
    printf("n    n");
    printf("tsizeof(unsigned short)：%dn",sizeof(unsigned short));
    printf("tsizeof(unsigned int)：%dn",sizeof(unsigned int));
    printf("tsizeof(unsigned long)：%dn",sizeof(unsigned long));
    printf("tsizeof(unsigned long long)：%dn",sizeof(unsigned long long));
    printf("tsizeof(unsigned char)：%dn",sizeof(unsigned char));

    printf("nn");

    
    printf("n");
    printf("tsizeof(float)：%un",sizeof(float));
    printf("tsizeof(double)：%un",sizeof(double));
    printf("tsizeof(long double)：%dn",sizeof(long double));

    printf("n");

    return 0;
}

运行截图如下：