CODEWITHSUNDEEP
objective-ciosequation
Nandi Hayes
Nandi Hayes

Reputation: 11

writing equations in objective c for iOS app

So I want to start out by saying I'm not a programmer by any means. What I want to do is build a productivity app to help me with my everyday job. Here's what I have.

    float u = ([startRate.text floatValue]);
    float v = ([grossProfit.text floatValue]);
    float w = y/40;
    float x = (x - z);
    float y = ([commissionRate.text floatValue]);
    float z = x / y;
    myPayRate.text = [[NSString alloc] initWithFormat:@"%3.2f", z];

So if the user enters...

u = 80
v = 800
y = 1.17

Then I need z to come out as 51, but instead I get "inf". Any help or insight is greatly appreciated.

Upvotes: 1

Views: 207

Answers (3)

user1721858
user1721858

Reputation: 11

maybe rearranging your code like so would help.

float u = ([startRate.text floatValue]);
float v = ([grossProfit.text floatValue]);
float y = ([commissionRate.text floatValue]);
float w = y/40;
float x = (x - z);
float z = x / y;
myPayRate.text = [[NSString alloc] initWithFormat:@"%3.2f", z];

Upvotes: 1

ThomasW
ThomasW

Reputation: 17317

What is most likely happening here is that the value of [commissionRate.text floatValue] is 0. Perhaps either commissionRate.text is empty or the value isn't being converted from a string to a float correctly, probably because the value of the string is different from what you expect it to be.

Put a breakpoint on the line float z = x / y; and examine the values of variables?

Upvotes: 1

user149341
user149341

Reputation:

You are initializing x as x - z. Where is x supposed to come from?

(Perhaps that's supposed to be w - z instead, since I don't see anything using w?)

Upvotes: 4

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