C reads txt into a two dimensional array implementation

Examples are as follows:

#include<stdio.h>
#include<stdlib.h>


#define maxn 200
void main()
{
 FILE *fp;
 int s[maxn][maxn];
 int i,j;
 if((fp=fopen("d:\\temp\\test.txt","r"))==NULL)
 { 
 printf(" can't open");
 exit(0);
 }


 
 for(i=0;i<maxn;i++)
 {
 for(j=0;j<maxn;j++)
 {
 fscanf(fp,"%d",&s[i][j]);
 }
 }
  
}