#include <stdio.h>

void print_row (int,char);	 // prints a row of characters of specified length.//
void print_2d (int,int,char);    // prints an mxn matrix of a specified character. //
void print_triangle (int,char);  // prints a triangle of specified width.          //
void print_tree (int,char);      // prints a triangle of specified width.          //
void print_base (int,char);      // prints a nice looking tree of specified width. //



int main(void){
	
	int num ;
	int rows;
	char ch,sel,sch ;

	printf("Lab 4. Functions , for loops , etc. \n");
	printf("Select an option (1,2,3,4)\n");
	printf("1. Print a row \n");
	printf("2. Print a \"matrix\" \n");
	printf("3. Print a triangle \n");
	printf("4. Print a tree ;) \n \n");
	printf("Selection:");
	
	scanf( "%c" , &sel );

// Selection 1. Print a row.													//

		if (sel == '1') {
			printf("Insert number of characters \n");
			scanf("%d%c",&num);
			
			printf("Insert the character you wish to print \n");
			scanf("%c%c",&ch);

			printf("\n-----------Result-----------\n");
		
			print_row(num,ch);
			
			printf("\n");
			
			} else { 
					
// Selection 2. Print a matrix (with characters). 						//			
			if (sel == '2') {
				printf("Insert the number for m \n");
				scanf("%d%c",&rows);
				printf("Insert the number for n \n");
				scanf("%d%c",&num);
				printf("Insert the character you wish to print \n");
				scanf("%c%c",&ch);
				printf("\n-----------Result-----------\n");

				print_2d(rows,num,ch);
				} else {

// Selection 3. Print a triangle.
				if (sel == '3') {
					printf("Insert the width of the base \n");
					scanf("%d%c",&num);
					printf("Insert the character you wish to print \n");
					scanf("%c%c",&ch);
					printf("\n-----------Result-----------\n");
			
					print_triangle(num,ch);
					} else {
							
// Selection 4. Print a tree.													//
					
					if (sel == '4') {
					printf("Insert the width of the base \n");
					scanf("%d%c",&num);
					printf("Insert the character you wish to print \n");
					scanf("%c%c",&ch);
					printf("Do you also wish to print the tree's log? (Y/N) \n");
					scanf("%c%c",&sch);							
					printf("\n-----------Result-----------\n");
					
					print_tree(num,ch);
							
					if ((sch=='Y')||(sch=='y')) { 
					print_base(num,ch);
					}
				}
			}
		}
	}
}
	
	
	
// Functions //

void print_row(int num,char ch){
	
	int x;

	for (x=0; x < num; x++){
		printf("%c",ch);
	}
}


void print_2d(int x,int y,char ch){
	
	int row;

	for (row=0; row < y; row++){
		print_row(x,ch);
		printf("\n");
	}

}



void print_triangle(int x,char ch){

	int col;

	for (col=0; col < x; col++){
		print_row(col,ch);
		printf("\n");
	}

}



void print_tree(int width,char ch){
	
	int charnum;

// Checking to see if the width of the tree is an odd number.      //
// An odd width will result in a normal tree structure whereas an  //
// even width will result in a tree structure without exact top.   //

	if (width%2){	
		width = (width/2);
		print_row((width+1),' ');
		printf ("%c \n",ch);
		charnum = 1;
		
// If the width is odd, every line will hold an even number of  	//
// characters, the analogous happens with even numbers.           //
// We set an incrementation by 2, and a starting value of 1 for  	//
// odd numbers and of 0 for even numbers.								   //

		}else{
		
		
		width = ((width/2));
		print_row (width,' ');
		printf ("/\\ \n");
		charnum = 0;
	}
	
// We then print the rest of the tree's "branches". 				   //
// Simply put, we increment the # of characters by 2 while        //
// crossing down and decrement each preceeding spaces by 1.       //	
	
	for (;0<width;width--){
		charnum=charnum+2;
		print_row(width,' ');
		print_row(charnum,ch);
		printf("\n");
		}
		
}


void print_base(int width,char ch){
	

	if (width%2){ 
		print_row( (width/2) ,' ');
		printf("%c %c \n ",ch,ch);
		
		}else{

		print_row((width/2),' ');
		printf("%c%c \n ",ch,ch);
		}
		
}