Objective c 客观数学
我将如何计算复合利率,到目前为止,我有:Objective c 客观数学,objective-c,ios,math,int,double,Objective C,Ios,Math,Int,Double,我将如何计算复合利率,到目前为止,我有: double principal = [[principalLabel text] doubleValue]; NSLog(@"Principal: %lf",principal); double years = [[yearsLabel text] doubleValue]; NSLog(@"Years: %lf",years); double months = [[monthsLabel text] doubleValue] / 12;
double principal = [[principalLabel text] doubleValue];
NSLog(@"Principal: %lf",principal);
double years = [[yearsLabel text] doubleValue];
NSLog(@"Years: %lf",years);
double months = [[monthsLabel text] doubleValue] / 12;
NSLog(@"Months: %lf",months);
double days = ([[daysLabel text] doubleValue] / 365) / 10;
NSLog(@"Days :%lf",days);
double rate = ([[rateLabel text] doubleValue] / 100);
NSLog(@"Rate: %lf",rate);
double time = years + days + months;
NSLog(@"Time: %lf",time);
double total = pow(principal * (1 - rate), time);
NSLog(@"Total: %lf",total);
double interest = pow(principal * (1 - rate), time) - principal;
NSLog(@"Interest: %lf",interest);
NSString *interestString = [[NSString alloc] initWithFormat:@"%lf",interest];
NSString *totalString = [[NSString alloc] initWithFormat:@"%lf",total];
[interestLabel setText:interestString];
[totalLabel setText:totalString];
如您所见,我有5个UITextFields用于:本金、利率、年、月、日。目前,我不断得到一些答案,虽然我的数学似乎是正确的,但与我想要的实际答案相差甚远。我已经彻底检查了我的代码,没有找到解决方案
My desired result is: E.g.
M = P * (1+R)^Y
M = 1000 * (1+0.10)^2
M = 1210
如果您将NSLog消息的输出也放在您的问题中,那么回答您的问题将更有帮助。目前,一个明显的错误如下: 在这行代码中
double total = pow(principal * (1 - rate), time);
你有一个利率,而你需要
double total = pow(principal * (1 + rate), time);
你在这方面面临的问题是什么?哪里出了问题,还不清楚。代码:
1-rate
,所需公式:1+R
P*(1+R)^Y
与(P*(1-R))^Y有很大不同