#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); }}