Function won't print anything back

Question

#include<stdio.h>
#include<math.h>
float ar(int a);
int  main()
{
    int a;
    scanf("%d",&a);
    printf("%.2f",ar(a));
    return 0;
}

float ar(int a)
{
    int i,br=0,uk=0;
    float ar;
    for(i=0;i<=a;i++)
    {
        if(a%i==0)
        {
            br++;
            uk=uk+i;
        }
    }
    ar=uk/br;
    return ar;
}

I'm trying to return the arithmetic value of all of the divisors of the number I enter. Why isn't anything getting printed back?

#include<stdio.h>
#include<math.h>
int razlika(int a);
int main(){

    printf("%d",razlika(26931));
    return 0;
    
    
}
int razlika(int a)
{
    int i,min=10000000,max=0,br=0,p,z;
    do{
        a=a/10;
        br++;
    }
    while (a!=0);
    
    
    for(i=0;i<br;i++)
    {
    p=a%10;
    a=a/10;
    if(p<min) min=p;
    if(p>max) max=p;
    }

    z=max-min;
    return z;
    
    

}

In this one im supposed to find the difference between the largest and the smallest digit of the number but it always prints out 0. I think it is because of the do while loop where i think i turn my number into 0? But I dont know how to count the number of the digits without making that mistake.

to explain @SaucyGoat's suggestion: stdout is usually [line buffered](https://stackoverflow.com/questions/36573074/what-do-fully-buffered-line-buffered-and-unbuffered-mean-in-c), meaning whatever is sent to stdout doesn't show up until a newline is sent. — Woodrow Barlow, Aug 25 '20 at 16:44
`uk/br` is using integer division and producing an integer result. You probably want to cast one or both of the operands to float. — Tom Karzes, Aug 25 '20 at 16:46
but i don't think that's the issue here because you are getting output, it's just always zero. — Woodrow Barlow, Aug 25 '20 at 16:46
is this two separate questions? you should ask them separately rather than grouping them together. — Woodrow Barlow, Aug 25 '20 at 16:49

YosefAhab · Accepted Answer · 2020-08-25T17:45:48.940

0

In your first program, your loop starts from 0, and you cant divide by zero.
As to your second program, you are correct, you changed the number to zero so you cant use it in the second loop, simply create a temporary variable and set it = a, use it in the do- while loop instead of a itself.
also in the do-while loop, let the condition be while (a>0).
Help this helps!

edited Aug 25 '20 at 17:45

answered Aug 25 '20 at 17:04

YosefAhab

64
10

Function won't print anything back

1 Answers1