#include <stdio.h>
int main(void) {

    //Rectangle Variables
    int W;
    int L;
    int i;
    int n;
    //Triangle Variables
    int k;
    int j;
    int h;
    //Hexagon Variables
    int a;
    int b;
    int c;
    int d;
    int e;
    //Line and Fill Characters
    char line;
    char fill;
    //User Input
    char input;

    fprintf(stdout, "= = = = = = = = = = = = = = = = = = = = = = = =\n");
    fprintf(stdout, "=       This program will draw a shape        =\n");
    fprintf(stdout, "=        using values that you input.         =\n");
    fprintf(stdout, "= = = = = = = = = = = = = = = = = = = = = = = =\n");

    do{
        fprintf(stdout, "= = = = = = = = = = = =\n");
        fprintf(stdout, "= '*' used for 'line' =\n");
        fprintf(stdout, "= ' ' used for 'fill' =\n");
        fprintf(stdout, "= = = = = = = = = = = =\n\n");     fprintf(stdout, "Enter the number corresponding to the shape you would like drawn:\n");
        fprintf(stdout, "1. Rectangle\n");
        fprintf(stdout, "2. Triangle\n");
        fprintf(stdout, "3. Hexagon\n");
        fprintf(stdout, "Or enter one of the following letters for the following options:\n");
        fprintf(stdout, "L: Change 'line' character\n");
        fprintf(stdout, "F: Change 'fill' character\n");
        fprintf(stdout, "Q: Quit program\n\n");
        fscanf(stdin, " %c", &input);

        //Rectangle Function

        if(input == '1') {
            fprintf(stdout, "\nEnter an integer (1 or greater) for the length: ");
            fscanf(stdin, " %d", &L);
            fprintf(stdout, "Enter an integer (1 or greater) for the width: ");
            fscanf(stdin, " %d", &W);
            fprintf(stdout, "\n");

            for(i = 0; i != W; i++) {
                for(n = 0; n != L; n++) {
                    if((i == 0) || (i == W - 1) || (n == L - 1) || (n == 0)) {
                        fprintf(stdout, "*");
                    }
                    else
                        fprintf(stdout, " ");
                }
                    fprintf(stdout, "\n");
            }
            fprintf(stdout, "\n");
         }

        //Triangle Function

       if(input == '2') {

            fprintf(stdout, "\nEnter an integer (1 or greater) for the height: ");
            fscanf(stdin, " %d", &h);
            fprintf(stdout, "\n");

                for(k = 1; k <= h; k++) {
                    for(j = k; j < h; j++) {
                        fprintf(stdout, " ");
                    }
                    for(j = 1; j <= k; j++) {
                        if(j == 1 || k == h) {
                            fprintf(stdout, "*");
                        }
                        else {
                            fprintf(stdout, " ");
                        }
                    }
                    for(j = 1; j < k; j++) {
                        if(j == k - 1 || k == h) {
                            fprintf(stdout, "*");
                        }
                        else {
                            fprintf(stdout, " ");
                        }
                    }
                    fprintf(stdout, "\n");
                }
            fprintf(stdout, "\n");
        }

        //Hexagon Function
           if(input == '3') {

            fprintf(stdout, "\nEnter an integer (1 or greater) for the length of each side: ");
            fscanf(stdin, " %d", &e);
            fprintf(stdout, "\n");

                for(a = 1, c = e, d = (2 * e) - 1; a < e; a++, c--, d++) {
                for(b = 0; b < (3 * e); b++) {
                    if(b == c || b == d || (a == 1 && b >= c && b <= d)) {
                        fprintf(stdout, "*");
                    }
                    else
                        fprintf(stdout, " ");
                }
                    fprintf(stdout, "\n");
                }

                for(a = 0, c = 1, d = (3 * e) - 2; a < e; a++, c++, d--) {
                    for(b = 0; b < (3 * e); b++) {
                        if(b == c || b == d || (a == e - 1 && b >= c && b <= d)) {
                        fprintf(stdout, "*");
                    }
                    else
                        fprintf(stdout, " ");
                }
                    fprintf(stdout, "\n");
                }
            fprintf(stdout, "\n");
        }
    }
    while(input != 'q' || input != 'Q');

    return 0;
}