lab2_3

/* prints sum of money in receipt format */

#include <stdio.h>
#define maxlines = 10

main()
{
    FILE *ifp, *ofp;
    float sum, line;
    int i, j;
    char last[4];
    char buffer[20], answer[20];

    ifp = fopen("input.txt", "r");
    ofp = fopen("output.txt", "w");

    while ( !feof(ifp) ) {
        fscanf(ifp, "%f\n", &line);
        sum += line;
    }


    i = sprintf(buffer, "%.2f", sum);
    last[0] = buffer[i-3];
    last[1] = buffer[i-2];
    last[2] = buffer[i-1];
    last[3] = buffer[i];

    switch (i+'0') {
        case '8': sprintf(answer, "%.2s\'%d%s", buffer, (int)sum % 1000, last);
                  break;
        case '7': sprintf(answer, "**%.1s\'%d %s", buffer, (int)sum % 1000, last);
                  break;
        case '6': sprintf(answer, "***%.2f", sum);
                  break;
        case '5': sprintf(answer, "****%.2f", sum);
                  break;
        case '4': sprintf(answer, "*****%.2f", sum);
                  break;
        case '3': sprintf(answer, "******%.2f", sum);
                  break;
        case '2': sprintf(answer, "*******%.2f", sum);
                  break;
        case '1': sprintf(answer, "********%.2f", sum);
                  break;
    }

    fprintf(ofp, "%s\n", answer);
    fprintf(ofp, "%s\n", "---------");
    fprintf(ofp, "%s\n", "123456789");
    puts("written to file");
    fclose(ifp);
    fclose(ofp);
    return 0;
}