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

int main()
{
    FILE *fPtr;
    char name[20];
    int age;

    printf("Please enter your name (max 19 characters): ");
    scanf("%s", name);
    printf("Hello, %s, what is your age? ", name);
    scanf("%d", &age);
    printf("Storing results to output file . . . ");
    if ((fPtr = fopen("output.file", "a")) != NULL)
    {
        fprintf(fPtr, "%s %d\n", name, age);
        printf("done.\n");
        fclose(fPtr);
    }
    else
    {
        fprintf(stderr, "ERROR writing output file.\n");
        exit(1);
    }

    return(0);
}