3.7 整形变量的定义

定义整形变量

int a;

给整形变量复制

a=1;

定义整形变量的时候赋值

int a=1;

例子：

#include<iostream>
using namespace std;
int main(){
    int a = -1;
    unsigned b = -2;
    short c = -3;
    long d = -4;
    unsigned long e;
    e = a + b + c + d;
    cout << "a:" << a << endl;
    cout << "b:" << b << endl;
    cout << "c:" << c << endl;
    cout << "d:" << d << endl;
    cout << "e:" << e << endl;
    return 0;
}

输出：

a:-1

b:4294967294

c:-3

d:-4

e:4294967286