Birdwatching program (fixed loop & file input)

This program reads a file that contains 12 lines of bird sightings and adds up all the sightings for a year.

/* Birdwatching program (fixed loop / file input) */ #include <stdio.h> int main (void) { FILE *birdfile; int birds, days, total, i, j; birdfile = fopen ("birds.txt", "r"); total = 0; /* loop goes though all 12 months */ for (i=1; i<=12; ++i) { /* reading the number of days of sightings */ fscanf (birdfile, "%d", &days); /* loop varies with number of days of sightings */ for (j=1; j<=days; ++j) { /* reading the number of birds */ fscanf (birdfile, "%d", &birds); total = total + birds; } } fclose (birdfile); printf ("Total number of birds sighted: %d\n", total); return(0); } Legend: preprocessor directives | variable declarations | main program | helper functions | user-defined structures | comments

Total number of birds sighted: 219 birds.txt file contains: 3 4 6 7 3 1 1 1 1 1 0 7 1 5 9 11 5 4 1 2 9 1 1 3 8 2 4 6 9 12 23 4 12 6 4 6 3 9 4 11 3 2 3 7 1 9 2 9 10