第10节:Objective-C 算术运算符



下表列出了所有支持Objective-C语言的算术运算符。假设变量A=10和变量B=20,则:

运算符描述示例
+Adds two operandsA + B = 30
-Subtracts second operand from the firstA - B = -10
*Multiplies both operandsA * B = 200
/Divides numerator by denominatorB / A = 2
%Modulus Operator and remainder of after an integer divisionB % A = 0
++Increments operator increases integer value by oneA++ = 11
--Decrements operator decreases integer value by oneA-- = 9

例子

尝试下面的例子就明白了在Objective-C编程语言的所有算术运算符:

#import <Foundation/Foundation.h>

main()
{
   int a = 21;
   int b = 10;
   int c ;

   c = a + b;
   NSLog(@"Line 1 - Value of c is %d
", c );
   c = a - b;
   NSLog(@"Line 2 - Value of c is %d
", c );
   c = a * b;
   NSLog(@"Line 3 - Value of c is %d
", c );
   c = a / b;
   NSLog(@"Line 4 - Value of c is %d
", c );
   c = a % b;
   NSLog(@"Line 5 - Value of c is %d
", c );
   c = a++; 
   NSLog(@"Line 6 - Value of c is %d
", c );
   c = a--; 
   NSLog(@"Line 7 - Value of c is %d
", c );

}

当编译和执行上述程序,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


转自:https://www.yiibai.com/objective_c/objective_c_arithmetic_operators.html#article-start


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