How to implement Directed Graph In C

Question

I'm trying to implementing a Directed graph in c program, which I have problem with. Please help me with this problem
#include <stdio.h>
#define n 1000
//the func
void func_adj(int i, int j){
arr[i][j]=1;
arr[j][i]=1;
}
int main() {
int arr[n][n],i,j,x;
printf("Enter The Node Numbers You Want To Add:");
scanf("%d",&x);
//here is the input goes to
for(i=0;i<x;i++){
for(j=0;j<x;j++){
scanf("%d",&arr[i][j]);
}
}
//here we call the func adjency chekck
for(i=0;i<x;i++){
for(j=0;j<x;j++){
func_adj(arr[i][j]);
}
}
//printing the derected graph of adj mat
for(i=0;i<x;i++){
for(j=0;j<x;j++){
printf("%d",arr[i][j]);
}
}
return 0;
}

Answer 1

Please specify problem....