9月17日 设计一个计算器
//
// ViewController.m
// 计算器
//
// Created by apple on 14-9-17.
// Copyright (c) 2014年 apple. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
{
NSString *op1,*op2;
char op;
}
@property (weak, nonatomic) IBOutlet UILabel *resultLabel;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
op1 = @"";
op2 = @"";
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)equal:(id)sender {
//NSString转int整形数值
int a1 = [op1 intValue];
int a2 = [op2 intValue];
int result = 0;
if (op == '+') {
result = a1 + a2;
} else if ( op =='-'){
result = a1-a2;
}else if(op=='*'){
result = a1*a2;
}else if(op=='/'){
result=a1/a2;
}
NSLog(@"%d", result);
NSString *resultText = [NSString stringWithFormat:@"%d", result];
self.resultLabel.text = resultText;
}
- (IBAction)divide:(id)sender {
op= '/';
}
- (IBAction)multiply:(id)sender {
op = '*';
}
- (IBAction)subtracting:(id)sender {
op = '-';
}
- (IBAction)add:(id)sender {
op = '+';
}
- (IBAction)num0:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,0];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,0];
}
}
- (IBAction)num9:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,9];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,9];
}
}
- (IBAction)num8:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,8];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,8];
}
}
- (IBAction)num7:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,7];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,7];
}
}
- (IBAction)num6:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,6];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,6];
}
}
- (IBAction)num5:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,5];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,5];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)num4:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,4];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,4];
}
}
- (IBAction)num3:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,3];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,3];
}
}
- (IBAction)num2:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,2];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,2];
}
}
- (IBAction)num1:(id)sender {
if (op != '+' && op != '-'
&& op != '*' && op != '/') {
//1231
op1 = [NSString stringWithFormat:@"%@%d", op1,1];
}else
{
op2 = [NSString stringWithFormat:@"%@%d", op2,1];
}
}
@end
