各数据类型所占的内存大小（单位：字节）

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
 int a;
 short b;
 long long c;
 unsigned short d;
 float e;
 double f;
    bool g;
    cout<<sizeof(a)<<" "<<sizeof(b)<<" "<<sizeof(c)<<" "<<sizeof(d)<<" "<<sizeof(e)<<" "<<sizeof(f)<<" "<<sizeof(g)<<endl;
}

输出结果：

4 2 8 2 4 8 1