//设计一个计算器对象实现求两数的和，求两数的商

#include<Foundation/Foundation.h>

@interface JiSuanQi : NSObject

+ (int)sumOfNum1 : (int)num1 andNum2 : (int)num2;

+ (int)averageOfNum1 :(int)num1 andNum2 : (int)num2;

@end // JiSuanQi类

@implementation JiSuanQi

+ (int)sumOfNum1 : (int)num1 andNum2 : (int)num2 // 类方法实现两个数字相加

{

    return num1+num2;

}

+ (int)averageOfNum1 :(int)num1 andNum2 : (int)num2 // 类方法实现两数的商

{

    int sum=[JiSuanQi sumOfNum1:num1 andNum2:num2];

    return sum/2;

}

@end

int main()

{

    int a=[JiSuanQi sumOfNum1:5 andNum2:3];

    int b=[JiSuanQi averageOfNum1:5 andNum2:3];

    NSLog(@"sum of num1 and num2 is %d",a);

    NSLog(@"average of num1 and num2 is %d",b);

    return 0;

}

虽然能看懂，建议能多写注释。这样更便于交流！