本文实例为大家分享了IO实现计算器功能的具体代码，供大家参考，具体内容如下
代码：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
//// ViewController.m// Fraction_Calculator//// Created by 鲁军 on 2021/4/26.//#import "ViewController.h"#import "Calculator.h"@interface ViewController ()@property(nonatomic,strong)IBOutlet UILabel *display;-(void)processDigit:(int) digit;-(void)processOp:(char)theOp;-(void)storeFracPart;//数字键-(IBAction)clickDigit:(UIButton*)sender;// 算术操作键-(IBAction) clickPlus;-(IBAction) clickMinus;-(IBAction) clickMultiply;-(IBAction) clickDivde;//Misc键-(IBAction) clickOver;-(IBAction) clickEquals;-(IBAction) clickClear;@end@implementation ViewController{ char op; int currentNumber; BOOL firstOperand,isNumerator; Calculator *myCalculator; NSMutableString *displayString;}- (void)viewDidLoad { [super viewDidLoad]; self.display.text=@""; firstOperand = YES; isNumerator = YES; displayString = [NSMutableString stringWithCapacity: 40]; myCalculator = [[Calculator alloc] init];}-(void) processDigit:(int) digit{ currentNumber = currentNumber * 10 + digit; [displayString appendString:[NSString stringWithFormat:@"%i",digit]]; self.display.text = displayString;}-(IBAction)clickDigit:(UIButton *)sender{ int digit = (int)sender.tag; [self processDigit:digit];}-(void)processOp:(char)theOp{ NSString * opStr; op = theOp; switch (theOp) { case '+': opStr = @" + "; break; case '-': opStr = @" - "; break; case '*': opStr = @" *"; break; case '/': opStr = @" / "; break; } [self storeFracPart]; firstOperand = NO; isNumerator = YES; [displayString appendString:opStr]; self.display.text = displayString;}-(void) storeFracPart{ if(firstOperand){ if(isNumerator){ myCalculator.operand1.numerator = currentNumber; myCalculator.operand1.denominator = 1; //例如 3 * 4/5 = } else { myCalculator.operand1.denominator = currentNumber; } } else if (isNumerator) { myCalculator.operand2.numerator = currentNumber; myCalculator.operand2.denominator = 1; }else{ myCalculator.operand1.denominator = currentNumber; firstOperand = YES; } currentNumber = 0;}-(IBAction)clickOver{ [self storeFracPart]; isNumerator = NO; [displayString appendString:@"/"]; self.display.text = displayString;}//算术操作键-(IBAction)clickPlus{ [self processOp:'+'];}- (void)clickMinus{ [self processOp:'-'];}- (void)clickMultiply{ [self processOp:'*'];}- (void)clickDivde{ [self processOp:'/'];}//Misc 键- (void)clickEquals{ if(firstOperand==NO){ [self storeFracPart]; [myCalculator performOperation:op]; [displayString appendString:@" = "]; [displayString appendString:[myCalculator.accumulator convertToString]]; self.display.text = displayString; currentNumber = 0; isNumerator = YES; firstOperand = YES; [displayString setString:@""]; }}- (void)clickClear{ isNumerator = YES; firstOperand = YES; currentNumber = 0; [myCalculator clear]; [displayString setString:@""]; self.display.text = displayString;}@end |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
//// Calculator.h// Fraction_Calculator//// Created by 鲁军 on 2021/5/9.//#import <Foundation/Foundation.h>#import "Fraction.h"NS_ASSUME_NONNULL_BEGIN@interface Calculator : NSObject@property(nonatomic,strong)Fraction *operand1,*operand2,*accumulator;-(Fraction *)performOperation:(char)op;-(void)clear;@endNS_ASSUME_NONNULL_END |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
//// Calculator.m// Fraction_Calculator//// Created by 鲁军 on 2021/5/9.//#import "Calculator.h"@implementation Calculator- (instancetype)init{ self = [super init]; if (self) { _operand1 = [[Fraction alloc] init]; _operand2 = [[Fraction alloc] init]; _accumulator = [[Fraction alloc] init]; } return self;}- (void)clear{ _accumulator.numerator = 0; _accumulator.denominator = 0;}- (Fraction *)performOperation:(char)op{ Fraction *result; switch (op) { case '+': result = [_operand1 add:_operand2]; break; case '-': result = [_operand1 subtract:_operand2]; break; case '*': result = [_operand1 multiply:_operand2]; break; case '/': result = [_operand1 divide:_operand2]; break; } _accumulator.numerator = result.numerator; _accumulator.denominator = result.denominator; return _accumulator;}@end |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
//// Fraction.h// Fraction_Calculator//// Created by 鲁军 on 2021/5/9.//#import <Foundation/Foundation.h>NS_ASSUME_NONNULL_BEGIN@interface Fraction : NSObject@property int numerator,denominator;-(void) print;-(void) setTo:(int) n over:(int) d;-(Fraction *) add:(Fraction *)f;-(Fraction *) subtract:(Fraction *)f;-(Fraction *) multiply:(Fraction *)f;-(Fraction *) divide:(Fraction *)f;-(void)reduce;-(double)convertToNum;-(NSString*)convertToString;@endNS_ASSUME_NONNULL_END |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
//// Fraction.m// Fraction_Calculator//// Created by 鲁军 on 2021/5/9.//#import "Fraction.h"@implementation Fraction- (void)setTo:(int)n over:(int)d{ self.numerator = n; _denominator = d;}- (void)print{ NSLog(@"%i/%i",_numerator,_denominator);}- (double)convertToNum{ if(_denominator!=0) return (double) _numerator / _denominator; else return NAN;}- (NSString *)convertToString{ if(_numerator==_denominator) if(_numerator==0) return @"0"; else return @"1"; else if (_denominator==1) return [NSString stringWithFormat:@"%i",_numerator]; else return [NSString stringWithFormat:@"%i/%i",_numerator,_denominator];}//添加一个分数到消息的接收器- (Fraction *)add:(Fraction *)f{ //将两个分数相加 Fraction *result = [[Fraction alloc] init]; result.numerator = _numerator *f.denominator + _denominator * f.numerator; result.denominator = _denominator*f.denominator; [result reduce]; return result;}- (Fraction *)subtract:(Fraction *)f{ Fraction *result = [[Fraction alloc] init]; result.numerator = _numerator*f.denominator - _denominator*f.numerator; result.denominator = _denominator*f.denominator; [result reduce]; return result;}- (Fraction *)multiply:(Fraction *)f{ Fraction *result = [[Fraction alloc] init]; result.numerator = _numerator*f.numerator; result.denominator = _denominator *f.denominator; [result reduce]; return result;}- (Fraction *)divide:(Fraction *)f{ Fraction *result = [[Fraction alloc] init]; result.numerator = _numerator*f.denominator; result.denominator = _denominator *f.numerator; [result reduce]; return result;}- (void)reduce{ int u = _numerator; int v = _denominator; int temp; if(u==0) return; else if (u<0) u = -u; while(v!=0){ temp = u%v; u=v; v=temp; } _numerator/=u; _denominator/=u;}@end |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/A1521315qwss/article/details/116568328
