下表顯示了Objective-C語言支援的所有算術運算子。 假設變數A=10，變數B=20，則 -
| 運算子 | 描述 | 範例 |
|---|---|---|
+ |
兩個運算元相加 | A + B = 30 |
- |
從第一個減去第二個運算元 | A - B = -10 |
* |
兩個運算元相乘 | A * B = 200 |
/ |
分子除以分母 | B / A = 2 |
% |
模數運算子，整數除法後的餘數 | B % A = 0 |
++ |
遞增運算子，將整數值增加1 |
A++，結果為11 |
-- |
遞減運算子，將整數值減1 |
A--，結果為9 |
嘗試以下範例來了解Objective-C程式設計語言中可用的所有算術運算子 -
#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 );
}
執行上面範例程式碼，得到以下結果：
2018-11-14 04:55:08.592 main[143613] Line 1 - Value of c is 31
2018-11-14 04:55:08.593 main[143613] Line 2 - Value of c is 11
2018-11-14 04:55:08.593 main[143613] Line 3 - Value of c is 210
2018-11-14 04:55:08.593 main[143613] Line 4 - Value of c is 2
2018-11-14 04:55:08.593 main[143613] Line 5 - Value of c is 1
2018-11-14 04:55:08.593 main[143613] Line 6 - Value of c is 21
2018-11-14 04:55:08.593 main[143613] Line 7 - Value of c is 22