Variable that shouldnt increase, increases

[ar9jun]

I'm trying out a practice program from a textbook where I have to take weight, height and age and then return the waist size by a given formula, but i'm having a problem, i put in 34 as the age so that the if(age>=30) runs, but when it goes into the for loop, the multiple is supposed to be 0, and it is, but it skips if(multiple=0) and turns multiple=1 and runs the else if statement, the code is below

void waist(int& weight, int& age){
	int waistSize;
	if (age >= 30){
		int multiple;
		int difference;
		for(int i = 0; i < 30; ++i){
			multiple = i%2;
                        cout << multiple << endl; //multiple = 0 here
			if (multiple = 0){ //but this step gets skipped for some reason
				difference = age-i;
				if (difference = 30){
					waistSize = (double(weight)/waistConst) + ((1/10)*double(i));
					cout << "Waist Size is " << waistSize << endl;
				}
			}
			else if (multiple = 1){ //and runs this step
				cout << multiple << endl; //multiple = 1 here
                                difference = age-i;
				cout << multiple << endl;
				if (difference = 30){
					waistSize = (double(weight)/waistConst) +  ((1/10)*double(i-1));
					cout << "Waist size: " << waistSize << endl;
				}
			}
		}
	}
	else{
		waistSize = double(weight)/waistConst;
	}
}

please help! i appreciate it =D

[TheIdeasMan]

Hi ar9jun ,

this bit
if (multiple = 0)

should be
if (multiple == 0)

you had assignment when when you needed comparison. same for the others.

HTH

[ToniAz]

Yeah :D

if (multiple = 0) change to if (multiple == 0)

Classic error, watch out from these, you'll be pounding you're head in the beginning and if you work with multiple languages at the same time.

[ar9jun]

of course! thank you very much!! it works now =D