23 lines
347 B
Objective-C
23 lines
347 B
Objective-C
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/**
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整型四则运算
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Author: Smallfly
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*/
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#import <Foundation/Foundation.h>
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@interface FourOperation : NSObject
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+ (FourOperation *)shared;
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/**
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整型四则运算
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@param expression 运算表达式，注意操作数和运算符之间要有空格
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@return 计算结果
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*/
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- (NSNumber *)caculateExpression:(NSString *)expression;
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@end
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