// Read annual rainfall and plot as bar graph
// This version reads years & their rainfall until end-of-file
// and puts -1 in the array as a a marker
// Andrew Taylor - andrewt@unsw.edu.au
// 13/4/2017

/*

Sample execution:

% dcc plot_rainfall4.c
% a.out
Enter year: 2005
Enter rainfall(mm): 816
Enter year: 2006
Enter rainfall(mm): 994.0
Enter year: 2007
Enter rainfall(mm): 1499.2
Enter year: 2008
Enter rainfall(mm): 1082.6
Enter year: 2009
Enter rainfall(mm): 956.2
Enter year: 2010
Enter rainfall(mm): 1153.8
Enter year: 2011
Enter rainfall(mm): 1369.2
Enter year: 2012
Enter rainfall(mm): 1213.6
Enter year: 2013
Enter rainfall(mm): 1344.4
Enter year: 2014
Enter rainfall(mm): 893.8
<control-D>

1 asterisk == 100 mm of rainfall
2005 ********
2006 *********
2007 **************
2008 **********
2009 *********
2010 ***********
2011 *************
2012 ************
2013 *************
2014 ********

*/

#include <stdio.h>

#define MAXIMUM_YEARS 20000
#define SCALE    100

int main(void) {
    int    whichYear[MAXIMUM_YEARS];
    double rainfall[MAXIMUM_YEARS];
    int    year, asterisk, nAsterisks;

    year = 0;
    while (year < MAXIMUM_YEARS) {
        printf("Enter year: ");
        if (scanf("%d", &whichYear[year]) == 0) {
            whichYear[year] = -1;
            year = MAXIMUM_YEARS;
        } else {
            printf("Enter rainfall(mm): ");
            scanf("%lf", &rainfall[year]);
            year = year + 1;
        }
    }
    whichYear[MAXIMUM_YEARS - 1] = -1;

    printf("\n1 asterisk == %d mm of rainfall\n", SCALE);

    year = 0;
    while (whichYear[year] >= 0) {
        printf("%4d ", whichYear[year]);
        nAsterisks = rainfall[year] / SCALE;
        asterisk = 0;
        while (asterisk < nAsterisks) {
            printf("*");
            asterisk = asterisk + 1;
        }
        printf("\n");
        year = year + 1;
    }

    return 0;
}