控制台输出错误
问题描述：
正在运行这段代码，但输出错误。应该得到：控制台输出错误
Converting 100.00 US dollars into foreign currency leaves $900.00
Charging 100.00 in foreign currency leaves $775.00 Converting 100.00 US dollars into foreign currency leaves
$1900.00
Charging 100.00 in foreign currency leaves $1750.00
，但我只得到：
Converting 100.00 US dollars into foreign currency leaves $900.00
下面是代码：
#import <Foundation/Foundation.h>
@interface Budget:NSObject {
float exchangeRate;
double budget;
double exchangeTransaction;
}
- (void) createBudget:(double)aBudget withExchangeRate:(float) anExchangeRate;
- (void) spendDollars:(double)dollars;
- (void) chargeForeignCurrency:(double)foreignCurrency;
@end
@implementation Budget
- (void) createBudget:(double)aBudget withExchangeRate:(float) anExchangeRate {
exchangeRate = anExchangeRate;
budget = aBudget;
}
- (void) spendDollars:(double)dollars {
budget -= dollars;
NSLog(@"Converting %.2f US dollars into foreign currency leaves $%.2f", dollars, budget);
}
-(void)chargeForeignCurrency:(double)foreignCurrency {
exchangeTransaction = foreignCurrency * exchangeRate;
budget -= exchangeTransaction;
NSLog(@"Charging %.2f in foreign currency leaves $%.2f", foreignCurrency, budget);
}
@end
int main(int argc, const char * argv[])
{
double numberDollarsInEuroland = 100;
double numberEuros = 100;
double numberDollarsInPoundland = 100;
double numberPounds = 100;
Budget *europeBudget = [Budget new];
[europeBudget createBudget:1000.00 withExchangeRate:1.2500];
[europeBudget spendDollars:numberDollarsInEuroland];
[europeBudget chargeForeignCurrency:numberEuros];
Budget *englandBudget = [Budget new];
[englandBudget createBudget:2000.00 withExchangeRate:1.5000];
[englandBudget spendDollars:numberDollarsInPoundland];
[englandBudget chargeForeignCurrency:numberPounds];
return 0;
}
有什么不对？提前致谢。
我没有看到任何错误。我编译并运行它，得到了你期望的结果。 – 2012-04-14 17:50:39
这是我的输出：将100.00美元转换成外币叶子900.00美元 收取外币叶子100.00美元775.00 将100.00美元转换成外币叶子1900.00美元 收取100.00美元的外币叶子$ 1750.00 – 2012-04-14 17:52:02
很奇怪。我试过你的代码，并且一切正常。输出我有你想要的。 – RomanHouse 2012-04-14 18:37:24