各位同学大神们，我学习类型大小的时候，完全按照书中的示例程序输入到电脑，可是输出结果和书上不同，如下：
//打印类型的大小
#include<stdio.h>
int main(void)
{
    printf("Type int has a size of %zd bytes.\n", sizeof(int));
    printf("Type char has a size of %zd bytes.\n", sizeof(char));
    printf("Type long has a size of %zd bytes.\n", sizeof(long));
    printf("Type long long has a size of %zd bytes.\n", sizeof(long long));
    printf("Type double has a size of %zd bytes.\n", sizeof(double));
    printf("Type long double has a size of %zd bytes.\n", sizeof(long double));
    getchar();
    return 0;
}
书中的输出结果是：
Type int has a size of 4 bytes.
Type char has a size of 1 bytes.
Type long has a size of 8 bytes.
Type long long has a size of 8 bytes.
Type double has a size of 8 bytes.
Type long double has a size of 16 bytes.
而我显示的结果却是：
Type int has a size of 4 bytes.
Type char has a size of 1 bytes.
Type long has a size of 4 bytes.
Type long long has a size of 8 bytes.
Type double has a size of 8 bytes.
Type long double has a size of 8 bytes.

各个类型我都没打错字啊。检查了好几遍了。谁有空的话请指教一下。多谢！！！

感谢您的回复，我以为是我学习错了呢。看来是系统定义类型长短不同。

感谢回复，我大概了解了，可能是编译器所在系统环境不同