Linear Search in C

#include<stdio.h>
#include<conio.h>
int process(int[],int);
void main()
{
    int i,n,num;
    int a[10]={21,31,56,1,3,5,6,9,69,78};
    printf("Enter number to be searched from 21,31,56,1,3,5,6,9,69,78 \n");
    scanf("%d",&num);
    process(a,num);
    getch();
}
int process(int a[],int num)
{
    int i,flag=0;
    for(i=0;i<10;i++)
    {
        if(a[i]==num)
        {
            flag=1;
            printf("Element %d found at %d",num,(i+1));
        }

    }
    if(flag==0)
    {
        printf("Invalid number and not found\n");
    }
      return 0;
}