Program to Find Number of Grandchildren - Zoho Programming Test Question

Here we will see a c program to find number of grandchildren, great grandchildren great-great grandchildren and so-on of a given person. In this program, the input is a table with two columns, 'Child' and 'Father'. Then we enter a name whose number grandchildren, great grandchildren  etc is to be calculated. We do not have to count children. An example is:
Given a two dimensional array of strings like

<”luke”, “shaw”>
<”wayne”, “rooney”>
<”rooney”, “ronaldo”>
<”shaw”, “rooney”> 

Where in each row, the first string is “child”, second string is “Father”. And given “ronaldo” we have to find his no of grandchildren. Here “ronaldo” has total 3 grandchildren (2 grandchildren: wayne and shaw ; a great grandchild luke). So our output should be 3.

#include<stdio.h>
#include<string.h>
int n;
char name[20];

struct reln{
char child[20];
char father[20];
}r[10];

int count=0;
void countChildren(char name[])
    {
    int j;
    for(j=0;j<n;j++)
        {
        if(strcmp(name,r[j].father)==0)
            {
            count++;
            countChildren(r[j].child);
            }
        }
    }

void main()
{
int i;
printf("\nEnter the number of inputs: ");
scanf("%d",&n);
for(i=0;i<n;i++)
    {
    scanf("%s",r[i].child);
    scanf("%s",r[i].father);
    }
printf("\nEnter name of the one whose no. of grandchildren is needed: ");
scanf("%s",name);
for(i=0;i<n;i++)
    {
    if(strcmp(r[i].father,name)==0)
        countChildren(r[i].child);
    }
printf("\nNo .of grandchildren of %s=%d",name,count);
}