Question

i am new to programming and i need your help…
i have a label named “typeLabel” that has a default label text se to “NiMH”. This text changes to NiCad through a pickerView. I want through an if-statement to change a multiplier value however “unused variable floatTime” halts the program. The code is:

-(IBAction)calculate:(id)sender {
    if ([typeLabel.text isEqualToString:@"NiCad"])
    {
        float floatTime=([mAhLabel.text floatValue]/chargerSlider.value)*1.4;
    } else {
        float floatTime=([mAhLabel.text floatValue]/chargerSlider.value)*1.5;
    }

    int intHourhs=(floatTime);
    float floatHours=(intHourhs);
    float floatMinutes=(floatTime-floatHours)*60;
    NSString *stringTotal = [NSString stringWithFormat: @"%1.1i Hours and %.0f Minutes", intHourhs, floatMinutes];
    chargeLabel.text=stringTotal;
}

Answer 1

You need to move the declaration above the if statement:

float floatTime;
if ([typeLabel.text isEqualToString:@"NiMH"])
{
    floatTime=([mAhLabel.text floatValue]/chargerSlider.value)*1.5;
} else {
    floatTime=([mAhLabel.text floatValue]/chargerSlider.value)*1.4;
}

When you declare a local variable inside a scope it is not visible outside that scope.