fork download 
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <iostream>
  4. #include <string>
  5.  
  6. //drawTriangle: Called on to draw the triangle
  7. void drawTriangle(int size, char direction, char pattern);
  8.  
  9. void ScanInputChar(std::string prompt, char &input, std::string expected)
  10. {
  11. 	do
  12. 	{
  13. 		std::string strInput;
  14. 		std::cout<<prompt;
  15. 		std::cin>>strInput;
  16. 		input = tolower(strInput.c_str()[0]);
  17. 	}
  18. 	while(expected.find(input) == std::string::npos);
  19. }
  20.  
  21. void ScanInputNum(std::string prompt, int &input, int expectedmin, int expectedmax)
  22. {
  23. 	do
  24. 	{
  25. 		std::string strInput;
  26. 		std::cout<<prompt;
  27. 		std::cin>>strInput;
  28. 		input = atoi(strInput.c_str());
  29. 	}
  30. 	while(input < expectedmin || input > expectedmax);
  31. }
  32.  
  33. int main() {
  34.     //Variables which will be filled by user
  35.     int size;
  36.     char direction, pattern;
  37.  
  38.     //Getting input from user
  39. 	ScanInputNum("Please enter the size of your triangle (Must be between 1-15)\n", size, 0, 15);
  40. 	ScanInputChar("Please enter the direction of your triangle (Either F or B)\n", direction, "fb");
  41. 	ScanInputChar("Please enter the pattern for your triangle (V for vertical, H for horizontal, or N for none)\n", pattern, "vhn");
  42.  
  43.     printf("\n\nHere is your triangle:\n\n");
  44.  
  45.     //Calling drawTirangle and sending the user input
  46.     drawTriangle(size, direction, pattern);
  47.  
  48. 	system("pause");
  49.  
  50. 	return 0;
  51. }
  52.  
  53. //drawTriangle: Draws the triangle using the users parameters
  54. void drawTriangle(int size, char direction, char pattern) 
  55. {
  56. 	int iPos = 0;
  57. 	int iIncrement = 0;
  58. 	bool bDirection = (direction == 'b'); //true if backward
  59.  
  60. 	if(bDirection)
  61. 		iIncrement = -1;
  62. 	else
  63. 		iIncrement = 1;
  64.  
  65. 	for(int i = 0; i < size; ++i,  iPos+=iIncrement)
  66. 	{
  67. 		if(bDirection)
  68. 		{
  69. 			for(int k = size-i;k>1; k--)
  70. 				printf("  ");
  71. 		}
  72.  
  73. 		for(int j = 0; j != iPos + iIncrement; j+=iIncrement)
  74. 		{
  75. 			if(bDirection)
  76. 				printf(" ");
  77.  
  78. 			if(pattern == 'v')
  79. 			{	
  80. 				if((j + ((i%2)*bDirection))%2==0)
  81. 					printf("#");
  82. 				else
  83. 					printf("*");
  84. 			}
  85. 			else if(pattern == 'h')
  86. 			{
  87. 				if(i%2==0)
  88. 					printf("#");
  89. 				else
  90. 					printf("*");
  91. 			}
  92. 			else
  93. 			{
  94. 				printf("*");
  95. 			}
  96.  
  97. 			if(!bDirection)
  98. 				printf(" ");
  99.  
  100. 		}
  101. 		printf("\n");
  102. 	}
  103. }
  104.  
Success #stdin #stdout #stderr 0s 3464KB
comments (?)
stdin 
10 F V
stdout 
Please enter the size of your triangle (Must be between 1-15)
Please enter the direction of your triangle (Either F or B)
Please enter the pattern for your triangle (V for vertical, H for horizontal, or N for none)


Here is your triangle:

# 
# * 
# * # 
# * # * 
# * # * # 
# * # * # * 
# * # * # * # 
# * # * # * # * 
# * # * # * # * # 
# * # * # * # * # *
stderr 
sh: 1: pause: not found
https://ideone.com/POFXPC
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!