Write a c program to search an element using linear search method

#include <stdio.h>
void main() {
    int n,x,flag=0;
    int a[n];
	printf("Enter a total number of values");
    scanf("%d",&n);
	printf("Enter all number");
    for(int i=0;i<n;i++) 
		scanf("%d",&a[i]);
	printf("Enter Search number");
    scanf("%d",&x);
    for(int i=0;i<n;i++) 
		if(a[i]==x){ 
			flag=1; 
			printf("Found at %d",i); 
			break; 
		}
    if(!flag) 
		printf("Not Found");
    
}