Ví dụ đọc file text 1

#include<stdio.h>
int main(void)
{
	int num;
	FILE *f;
	f = fopen("numb.txt","r");
	while (!feof(f))
	{
		fscanf(f,"%d",&num);
		printf("n = %d",num);
	}
	fclose(f);
	return 0;	
}