main.cpp

#include #include #include #include "canvas.h"

using namespace std;

inline void _test(const char* expression, const char* file, int line) { cerr

#define test(EXPRESSION) ((EXPRESSION) ? (void)0 : _test(#EXPRESSION, __FILE__, __LINE__))

void interactive_mode(char ink) { cout 'D') invalid_chars += line[i]; if (invalid_chars.size() > 0) { cout 0) { Canvas C(line); C.replace('#', ink); cout

exit(0); }

int main() { // Interactive mode. // Uncomment the "interactive_mode..." line below to // use your Canvas implementation interactively. // // The parameter specifies the character used to fill letters. // // interactive_mode('@');

// Test Canvas(int) Canvas C1(3); test(C1.width() == 3); test(C1.to_string() == string(" ") + " " + " " + " " + " "); Canvas C2(4); test(C2.width() == 4); test(C2.to_string() == string(" ") + " " + " " + " " + " "); Canvas C3(7); test(C3.width() == 7); test(C3.to_string() == string(" ") + " " + " " + " " + " ");

// Test Canvas(char) Canvas C4('A'); test(C4.width() == 5); test(C4.to_string() == string(" ### ") + "# # " + "##### " + "# # " + "# # "); Canvas C5('B'); test(C5.width() == 5); test(C5.to_string() == string("#### ") + "# # " + "#### " + "# # " + "#### "); Canvas C6('C'); test(C6.width() == 5); test(C6.to_string() == string(" #### ") + "# " + "# " + "# " + " #### "); Canvas C7('D'); test(C7.width() == 5); test(C7.to_string() == string("#### ") + "# # " + "# # " + "# # " + "#### "); Canvas C8('E'); test(C8.width() == 5); test(C8.to_string() == string(" ") + " " + " " + " " + " ");

// Test replace() C5.replace('#', '@'); test(C5.width() == 5); test(C5.to_string() == string("@@@@ ") + "@ @ " + "@@@@ " + "@ @ " + "@@@@ "); C5.replace(' ', '-'); test(C5.width() == 5); test(C5.to_string() == string("@@@@- ") + "@---@ " + "@@@@- " + "@---@ " + "@@@@- "); C5.replace('-', '@'); test(C5.width() == 5); test(C5.to_string() == string("@@@@@ ") + "@@@@@ " + "@@@@@ " + "@@@@@ " + "@@@@@ "); C5.replace('@', '$'); test(C5.width() == 5); test(C5.to_string() == string("$$$$$ ") + "$$$$$ " + "$$$$$ " + "$$$$$ " + "$$$$$ "); C6.replace(' ', '*'); test(C6.width() == 5); test(C6.to_string() == string("*#### ") + "#**** " + "#**** " + "#**** " + "*#### "); C7.replace('#', '*'); test(C7.width() == 5); test(C7.to_string() == string("**** ") + "* * " + "* * " + "* * " + "**** "); C8.replace('#', ' '); test(C8.width() == 5); test(C8.to_string() == string(" ") + " " + " " + " " + " ");

// Test add() Canvas C9('A'); C9.add('C'); test(C9.width() == 12); test(C9.to_string() == string(" ### #### ") + "# # # " + "##### # " + "# # # " + "# # #### "); C9.add('B'); test(C9.width() == 19); test(C9.to_string() == string(" ### #### #### ") + "# # # # # " + "##### # #### " + "# # # # # " + "# # #### #### "); C9.add('D'); test(C9.width() == 26); test(C9.to_string() == string(" ### #### #### #### ") + "# # # # # # # " + "##### # #### # # " + "# # # # # # # " + "# # #### #### #### "); C9.add('!'); test(C9.width() == 33); test(C9.to_string() == string(" ### #### #### #### ") + "# # # # # # # " + "##### # #### # # " + "# # # # # # # " + "# # #### #### #### "); C9.add('C'); test(C9.width() == 40); test(C9.to_string() == string(" ### #### #### #### #### ") + "# # # # # # # # " + "##### # #### # # # " + "# # # # # # # # " + "# # #### #### #### #### ");

// Test Canvas(string) Canvas C10("ADD"); test(C10.width() == 19); test(C10.to_string() == string(" ### #### #### ") + "# # # # # # " + "##### # # # # " + "# # # # # # " + "# # #### #### "); Canvas C11("VBAD!"); test(C11.width() == 33); test(C11.to_string() == string(" #### ### #### ") + " # # # # # # " + " #### ##### # # " + " # # # # # # " + " #### # # #### "); Canvas C12("DAD CAB"); test(C12.width() == 47); test(C12.to_string() == string("#### ### #### #### ### #### ") + "# # # # # # # # # # # " + "# # ##### # # # ##### #### " + "# # # # # # # # # # # " + "#### # # #### #### # # #### ");

cout

canvas.h

#ifndef CANVAS_H #define CANVAS_H

#include

using namespace std;

// In this homework, you'll manipulate ASCII art images // consisting of a rectangular grid of chararacter pixels. class Canvas { public: // Allocates a canvas of the given width and height 5 that // consists entirely of ' ' (space) chars. Canvas(int width);

// Allocates a canvas with width 5 and height 5 that looks like: // // ### #### #### #### // # # # # # # # // ##### or #### or # or # # // # # # # # # # // # # #### #### #### // // depending upon which character ('A', 'B', 'C', or 'D') is // given as a parameter. If some other character is given, // allocates a canvas of ' ' chars with width 5 and height 5. Canvas(char x);

// Allocates a canvas containing the sequence of characters // in the string with 2 columns of space between each pair // of adjacent characters. For instance, Canvas("BADCAB") // should yield: // // #### ### #### #### ### #### // # # # # # # # # # # # // #### ##### # # # ##### #### // # # # # # # # # # # # // #### # # #### #### # # #### // // Any characters in s not from {'A', 'B', 'C', 'D'} should be // replaced with empty 5x5 space, just like previous constructor. Canvas(string s); // Returns the width of the canvas. int width();

// Returns the entire canvas as a single string, consisting of each row // of the canvas, followed by the newline character (' '). string to_string(); // Replaces every instance in the canvas of old_char with new_char. // For instance, if old_char is '#' and new char is '@', then: // // ### @@@ // # # @ @ // ##### becomes @@@@@ // # # @ @ // # # @ @ // void replace(char old_char, char new_char);

// Adds a character to the Canvas's sequence of characters. void add(char x);

// Destructor. Deallocates all of the memory allocated by the canvas. ~Canvas();

private: // A canvas is represented as a 2D char array, i.e. // an array of pointers to char (sub)arrays. // Each subarray corresponds to a column of the image. char** C; int _width; };

#endif

In this homework, you'll implement a class that represents "ASCIl art" images and operations on them, represented as two-dimensional char arrays allocated on the heap (using the new keyword) char * * C width char* array height | |, # ,| |, # char arrays The following files are given to you: 1. A C++header file (canvas.h) declaring the Canvas class. 2. A C++ source file (main.cpp) containing a main() function with tests. Create a new C++ source file named canvas.cpp that implements the class declared in canvas.h so that canvas.cpp and the provided files compile into a program that runs with no failed tests. Submit just the source file canvas.cpp. You don't need to submit the main.cpp file because I will use my own canvas.h and main.cpp files to evaluate your canvas.cpp file. In this homework, you'll implement a class that represents "ASCIl art" images and operations on them, represented as two-dimensional char arrays allocated on the heap (using the new keyword) char * * C width char* array height | |, # ,| |, # char arrays The following files are given to you: 1. A C++header file (canvas.h) declaring the Canvas class. 2. A C++ source file (main.cpp) containing a main() function with tests. Create a new C++ source file named canvas.cpp that implements the class declared in canvas.h so that canvas.cpp and the provided files compile into a program that runs with no failed tests. Submit just the source file canvas.cpp. You don't need to submit the main.cpp file because I will use my own canvas.h and main.cpp files to evaluate your canvas.cpp file