Thread: An equivalent "strlen function" for integer arrays?

Good day C gurus

I was trying to code the biggest commum divisor for two number program but was confronted to a problem

here is my code by the way

Code:

#include <stdio.h>
#include <stdlib.h>


int main()
{
    int a=100;
    int b=34;
    int diva[100]={0};// is the array in which i store the divisors or the numbuer a;
    int divb[100]={0};// is the array in which i store the divisors or the numbuer b;
    int max=1;
    int counta=0;int countb=0 ;int i; int j=0;int k=0;
    for(i=1;i<a;++i)
    {
        if(a%(a-i)==0)
        {
        diva[j]=a-i;
        j++;
        }


    }


        for(i=1;i<b;++i)
        {
        if(b%(b-i)==0)
        {
             divb[k]=b-i;
        k++;
        }


        }
for(j=0;diva[j]!=0;++j)
{
    printf(" the divisors of the number %i are %i\t",a,diva[j]);
++counta;  // I needed to use a counter to know how many elements in my array diva I do have
}


for(k=0;divb[k]!=0;++k)
{
   printf("\nthe divisors of the number %i are %i\t",b,divb[k]);
++countb; // I needed to use a counter to know how many elements in my array diva I do have
}


for(j=0;j<=counta;++j)
{
   for(k=0;k<=countb;++k)
   {
    if(diva[j]==divb[k] && diva[j]>max )
    max=diva[j];
   }




}


printf(" the biggest commun divisor  is:%d", max);
}

My code is fine, but during the coding process i got stuck with the following problems and i'm just trying to understand them:

• If i don't initialize my diva and divb arrays to 0 I keep getting strange numbers! why?
• Is there any way for int array to ask the progrem to end the loop when i<strlen(array) in case of integer array or like arra[i]!='\0"?

As you can see, im using the counters (counta and countb) to figure out the necessary loops numbers.
Many thanks in advance!!