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c++运算符,前后递增以及区别

小布_cvg 2022-05-02 阅读 31
#include<iostream>
using namespace std;
int main()
{
	//加法先入门,其他格式与加法都一致
	int a1 = 10;
	int b1 = 3;
	int c1 = 0;
	c1 = b1 + a1;
	cout <<"c1(a1+b1的值是)       " << c1 << endl;

	//1.前置递增
	int a = 12;
	++a;   //让a+1
    cout << "a=" << a << endl;

	//2.后置递增
	int b = 12;
	b++;  //让b+1
	cout << "b=" << b << endl;

	//前置和后置区别:前置递增先让变量+1在进行表达式的运算
                    //后置递增先进行表达式的计算在+1
	//for example
	//前置
	int c = 10;
	int d = ++c * 10;
	cout << "c=" << c << endl;
	cout << "d=" << d << endl;

	//后置
	int e = 10;
	int f = e++ * 10;
	cout << "e=" << e << endl;
	cout << "f=" << f << endl;





	system("pause");
	return 0;
}


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