Objective-C 中的算术运算符
下表列出了 Objective-C 语言支持的所有算术运算符。 假设变量A为10，变量B为20，则 −
| 运算符 | 描述 | 示例 |
|---|---|---|
| + | 添加两个操作数 | A + B 将给出 30 |
| - | 从第一个操作数中减去第二个操作数 | A - B 将给出 -10 |
| * | 两个操作数相乘 | A * B 会给出 200 |
| / | 分子除以分母 | B / A 会给出 2 |
| % | 模数运算符和整数除法后的余数 | B % A 将给出 0 |
| ++ | 自增运算符将整数值加一 | A++ 将给出 11 |
| -- | 自减运算符将整数值减一 | A-- 将给出 9 |
示例
尝试以下示例来理解 Objective-C 编程语言中可用的所有算术运算符 −
#import <Foundation/Foundation.h>
int main() {
int a = 21;
int b = 10;
int c ;
c = a + b;
NSLog(@"Line 1 - Value of c is %d\n", c );
c = a - b;
NSLog(@"Line 2 - Value of c is %d\n", c );
c = a * b;
NSLog(@"Line 3 - Value of c is %d\n", c );
c = a / b;
NSLog(@"Line 4 - Value of c is %d\n", c );
c = a % b;
NSLog(@"Line 5 - Value of c is %d\n", c );
c = a++;
NSLog(@"Line 6 - Value of c is %d\n", c );
c = a--;
NSLog(@"Line 7 - Value of c is %d\n", c );
}
当你编译并执行上面的程序时，它会产生以下结果 −
2013-09-07 22:10:27.005 demo[25774] Line 1 - Value of c is 31 2013-09-07 22:10:27.005 demo[25774] Line 2 - Value of c is 11 2013-09-07 22:10:27.005 demo[25774] Line 3 - Value of c is 210 2013-09-07 22:10:27.005 demo[25774] Line 4 - Value of c is 2 2013-09-07 22:10:27.005 demo[25774] Line 5 - Value of c is 1 2013-09-07 22:10:27.005 demo[25774] Line 6 - Value of c is 21 2013-09-07 22:10:27.005 demo[25774] Line 7 - Value of c is 22
objective_c_operators.htm
