#include<stdio.h>
int main()
{
    //sizeof()：查看字符在内存中大小的函数
    printf("%d \n ",sizeof(char));  //打印char（字符型）在内存中所占的大小
    printf("%d \n ",sizeof(int));   //打印int（整型）在内存中所占的大小
    printf("%d \n ",sizeof(short));   //打印short（短整型）在内存中所占的大小
    printf("%d \n ",sizeof(long));   //打印long（长整型）在内存中所占的大小
    printf("%d \n ",sizeof(long long));   //打印long long（长长整型）在内存中所占的大小
    printf("%d \n ",sizeof(float));   //打印float（单精度浮点型）在内存中所占的大小
    printf("%d \n ",sizeof(double));   //打印double（双精度浮点型）在内存中所占的大小

    return(0);
}

//8 bit = 1 byte
//1024 byte = 1 KB
//1024 KB = 1 MB
//1024 MB = 1 GB
//1024 GB = 1 TB
//1024 TB = 1 PB