Linear search program

#include <stdio.h>
void main()
{
int a [5] = { 10, 20, 30, 40, 50}
int a key, flag =0,i;
printf ("Enter Search key "); Scanf("%d", &key);
for (i=0;i<5; i++)
{
if (key ==a[i])
{
flag = 1;
break;
if (flag == 1)
}
printf ("Enter key is found!");
else
printf (key is not found);
}