reading 3 integers from a file in C

 #include <stdio.h>

int main(){

FILE * ptr;

ptr=fopen("integer_file.txt","r");

int num1,num2,num3;

fscanf(ptr,"%d %d %d",&num1,&num2,&num3);

printf("The 3 integers are %d %d %d\n",num1,num2,num3);

fclose(ptr);

 return 0;

}