C++学习日志 2
赋值运算符
作用:用于将表达式的值赋给变量
赋值运算符包括以下几个符号:
运算符术语示例结果
=赋值a=2;b=3;a=2;b=3;
;+=加等于a=0;a+=2;a=2;
-=减等于a=5;a-=3;a=2;
*=乘等于a=2;a*=2;a=4;
/=除等于a=4;a/=2;a=2;
%=模等于a=3;a%2;a=1;
示例:
#include
using namespace std;
int main() {
//赋值运算符
// =
int a = 10;
a = 100;
cout << "a = " << a << endl; //输出100
// +=
a = 10;
a += 2;
cout << "a = " << a << endl; //输出12
// -=
a = 10;
a -= 2;
cout << "a = " << a << endl; //输出8
// *=
a = 10;
a *= 2;
cout << "a = " << a << endl; //输出20
// /=
a = 10;
a /= 2;
cout << "a = " << a << endl; //输出5
// %=
a = 10;
a %= 2;
cout << "a = " << a << endl; //输出0
system("pause");
return 0;
}
作用:用于将表达式的值赋给变量
赋值运算符包括以下几个符号:
运算符术语示例结果
=赋值a=2;b=3;a=2;b=3;
;+=加等于a=0;a+=2;a=2;
-=减等于a=5;a-=3;a=2;
*=乘等于a=2;a*=2;a=4;
/=除等于a=4;a/=2;a=2;
%=模等于a=3;a%2;a=1;
示例:
#include
using namespace std;
int main() {
//赋值运算符
// =
int a = 10;
a = 100;
cout << "a = " << a << endl; //输出100
// +=
a = 10;
a += 2;
cout << "a = " << a << endl; //输出12
// -=
a = 10;
a -= 2;
cout << "a = " << a << endl; //输出8
// *=
a = 10;
a *= 2;
cout << "a = " << a << endl; //输出20
// /=
a = 10;
a /= 2;
cout << "a = " << a << endl; //输出5
// %=
a = 10;
a %= 2;
cout << "a = " << a << endl; //输出0
system("pause");
return 0;
}
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