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

---

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；

---

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

---

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

---

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 

---

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