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计算器（可累加，可清零）
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *resultLabel;
@end
NSString *op1,*op2,*result;
char op;
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSLog (@"hello world");
op1=@"";
op2=@"";
result=@"";
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)butten1:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘) {
op1=[NSString stringWithFormat:@"%@%d",op1,1];
self.resultLabel.text = op1;
}else{
op2=[NSString stringWithFormat:@"%@%d",op2,1];
self.resultLabel.text = op2;
}
}
- (IBAction)butter2:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,2];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,2];
self.resultLabel.text = op2;
}
}
- (IBAction)butter3:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,3];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,3];
self.resultLabel.text = op2;
}
}
- (IBAction)butter4:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,4];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,4];self.resultLabel.text = op2;
}
}
- (IBAction)butter5:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,5];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,5];self.resultLabel.text = op2;
}
}
- (IBAction)butter6:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,6];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,6];
self.resultLabel.text = op2;
}
}
- (IBAction)butter7:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,7];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,7];
self.resultLabel.text = op2;
}
}
- (IBAction)butter8:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,8];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,8];
self.resultLabel.text = op2;
}
}
- (IBAction)butter9:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,9];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,9];
self.resultLabel.text = op2;
}
}
- (IBAction)butter0:(id)sender {
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘)
{
op1=[NSString stringWithFormat:@"%@%d",op1,0];
self.resultLabel.text = op1;
}else
{
op2=[NSString stringWithFormat:@"%@%d",op2,0];
self.resultLabel.text = op2;
}
}
- (IBAction)jian:(id)sender {
op=‘-‘;
}
- (IBAction)cheng:(id)sender {
op=‘*‘;
}
- (IBAction)chu:(id)sender {
op=‘/‘;
}
- (IBAction)plus:(id)sender {
op=‘+‘;
}
- (IBAction)dengyu:(id)sender {
if (op == ‘+‘) {
//NSString转int整形数值
int a1 = [op1 intValue];
int a2 = [op2 intValue];
int sum = a1 + a2;
NSLog(@"%d", sum);
result = [NSString stringWithFormat:@"%d", sum];
self.resultLabel.text = result;
}
else if (op==‘-‘)
{
int a1 = [op1 intValue];
int a2 = [op2 intValue];
int sum = a1 - a2;
NSLog(@"%d", sum);
result = [NSString stringWithFormat:@"%d", sum];
self.resultLabel.text = result;
}
else if (op==‘*‘){
int a1 = [op1 intValue];
int a2 = [op2 intValue];
int sum = a1 * a2;
NSLog(@"%d", sum);
result = [NSString stringWithFormat:@"%d", sum];
self.resultLabel.text = result;
}
else{
float a1 = [op1 floatValue];
float a2 = [op2 floatValue];
float sum = a1 / a2;
NSLog(@"%f", sum);
result = [NSString stringWithFormat:@"%f", sum];
self.resultLabel.text = result;
}
if (op!=‘+‘&&op!=‘-‘&&op!=‘*‘&&op!=‘/‘) {
op1=@"";
op2=@"";
result=@"";
}else
{
op1=result;
op2=@"";
}
}
- (IBAction)qingling:(id)sender {
op1=@"";
op2=@"";
op = ‘\0‘;
result=@"";
self.resultLabel.text = @"0";
}
@end
计算器（可累加，可清零）