C++：赋值运算符（17）

赋值也就是将后面的值赋值给变量，这里最常用的就是=   ，a=1那么a就是1，此外还包含以下的赋值运算

=	等于	int a = 1; a=10	a=10
+=	加等于	int a = 1; a+=1;	a=2
-=	减等于	int a = 1; a-=1;	a=0
*=	乘等于	int a = 2; a*=5;	a=10
/=	除等于	int a = 10; a/=2;	a=5
%=	模等于	int a = 10; a%=2;	a=0

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接下来我用不一样的数去演示一遍

加等于

#include<iostream>
using namespace std;int main()
{//	=	等于int a = 1;a = 10;cout << "a = " << a << endl;//	+=	加等于a += 10;	// a += 10;	== a = a + 10 ;cout << "a = " << a << endl;system("pause");return 0;
}

a += 10;   等于  a = a + 10；

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减等于

#include<iostream>
using namespace std;int main()
{//	=	等于int a = 1;a = 10;cout << "a = " << a << endl;//	+=	加等于a += 10;	// a += 10;	== a = a + 10 ;cout << "a = " << a << endl;//	-=	减等于a = 10;a -= 5;		// a -= 5;	== a = a - 5 ;cout << "a = " << a << endl;system("pause");return 0;
}

 a -=5       等于        a = a - 5

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乘等于

#include<iostream>
using namespace std;int main()
{//	=	等于int a = 1;a = 10;cout << "a = " << a << endl;//	+=	加等于a += 10;	// a += 10;	== a = a + 10 ;cout << "a = " << a << endl;//	-=	减等于a = 10;a -= 5;		// a -= 5;	== a = a - 5 ;cout << "a = " << a << endl;//	*=	乘等于a = 10;a *= 10;cout << "a = " << a << endl;system("pause");return 0;
}

a *= 10        等于        a = a * 10

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除等于

 

#include<iostream>
using namespace std;int main()
{//	=	等于int a = 1;a = 10;cout << "a = " << a << endl;//	+=	加等于a += 10;	// a += 10;	== a = a + 10 ;cout << "a = " << a << endl;//	-=	减等于a = 10;a -= 5;		// a -= 5;	== a = a - 5 ;cout << "a = " << a << endl;//	*=	乘等于a = 10;a *= 10;cout << "a = " << a << endl;//	/=	除等于a = 10;a /= 2;cout << "a = " << a << endl;system("pause");return 0;
}

a /=2   等于 a=a/2 

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模等于

#include<iostream>
using namespace std;int main()
{//	=	等于int a = 1;a = 10;cout << "a = " << a << endl;//	+=	加等于a += 10;	// a += 10;	== a = a + 10 ;cout << "a = " << a << endl;//	-=	减等于a = 10;a -= 5;		// a -= 5;	== a = a - 5 ;cout << "a = " << a << endl;//	*=	乘等于a = 10;a *= 10;cout << "a = " << a << endl;//	/=	除等于a = 10;a /= 2;cout << "a = " << a << endl;//	%=	模等于a = 9;a %= 2;cout << "a = " << a << endl;system("pause");return 0;
}

 a%=2   等于 a=a%2