How to find index of the Array in C

 #include<stdio.h>

int main()

{         

    int i,num,s,flag=0;

    int a[10];

    printf("How many elements you want to enter :  ");

    scanf("%d",&num);

    printf("Enter %d elements in the Array ", num);

    for(i=0; i<num; i++){

    scanf("%d",&a[i]);

}

printf("Enter the Element you to Search : ");

scanf("%d",&s);

for(i=0; i<num; i++){

if(a[i]==s){

flag=1;

break;

}

} 

if (flag==0){

printf("Not Found ");

}else {

printf("Element Found ");

for(i=0; i<num; i++){

if(a[i]==s)

{

printf("%d is Present at Location %d \n",s,i+1);

break;

}

}

}

return 0;

}