使用Object-c类实现简单地加减乘除运算

来源：互联网发布：贵州省大数据培训编辑：程序博客网时间：2024/05/16 18:11

////  main.m//  prog1////  Created by songjs on 15-1-6.//  Copyright (c) 2015年 songjs. All rights reserved.//#import <Foundation/Foundation.h>//实现一个简单的4则运算计数器@interface Calculator:NSObject//累加方法-(void) setAccumulator:(double) value;-(void) clear;-(double) accumulator;//算术方法-(void) add:(double) value;-(void) subtract: (double) value;-(void) multiply:(double) value;-(void) divide:(double) value;@end@implementation Calculator{    double accumulator;}-(void) setAccumulator:(double)value{    accumulator = value;}-(void) clear{    accumulator = 0;}-(double) accumulator{    return accumulator;}//算术方法实现-(void) add:(double) value{    accumulator += value;}-(void) subtract:(double)value{    accumulator -= value;}-(void) multiply:(double)value{    accumulator *= value;}-(void) divide:(double)value{    accumulator /= value;}@endint main(int argc, const char * argv[]) {    @autoreleasepool {        //使用        Calculator *deskCalc = [[Calculator alloc] init];        [deskCalc setAccumulator:100.0];        [deskCalc add:200.0];        [deskCalc divide:15.0];        [deskCalc subtract:10.0];        [deskCalc multiply:5];        NSLog(@"the result is %g\n",[deskCalc accumulator]);    }    return 0;}

说明：对于object-c这个语言，其它的一些基本语法，如：for、while、do_while、if_else、三元运算符等的基本使用都类似。

0 0