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How can I add a loop for this code

  #1  
Dec 1st, 2008
The code is pretty easy to understand what I am doing. You basically pick a number 1-4 and it will do either addition, subtraction, multiplication, or division. What I need it to do is after they do a problem it loops back and lets them do it again, until they enter 5 to end the program.

Thanks.

Here is my code

cplusplus Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <iomanip>
  4. #include <ctime>
  5.  
  6. using namespace std;
  7.  
  8.  
  9. int main ()
  10.  
  11. {
  12. 	srand((unsigned)time(0)); 
  13. 	int add1, add2, sub1, sub2;
  14. 	int multiply1, multiply2, div1, div2;
  15. 	int choice, input;
  16. 	add1 = (rand()%500)+1;
  17. 	add2 = (rand()%500)+1; 
  18. 	sub1 = (rand()%500)+1;
  19. 	sub2 = (rand()%98)+1;
  20. 	multiply1 = (rand()%98)+1;
  21. 	multiply2 = (rand()%8)+1;
  22. 	div1 = (rand()%500)+1;
  23. 	div2 = (rand()%8)+1;
  24. 	int addAnswer = add1 + add2;
  25. 	int subAnswer = sub1- sub2;
  26. 	int multiplyAnswer = multiply1 * multiply2;
  27. 	int divAnswer = div1 / div2;
  28.  
  29.  
  30.  
  31. 	//Display the menu and get the user's choice
  32. 		cout << "         Geometry Calculator \n\n";
  33. 		cout << "1. Addition\n";
  34. 		cout << "2. Subtraction\n";
  35. 		cout << "3. Multiplication\n";
  36. 		cout << "4. Division\n";
  37. 		cout << "5. Quit\n";
  38. 		cout << "\n";
  39.  
  40. 		cout <<"Enter your choice (1-5): ";
  41. 		cin >> choice;
  42. 		cout << "\n";
  43.  
  44.  
  45. if (choice==1)
  46. {
  47. 	cout << setw (6) << add1 << endl; 
  48. 	cout << "+ ";
  49. 	cout << setw (4) << add2 << endl;
  50. 	cout << "------";
  51. 	cout << "\n";
  52. 	cin >> input; 
  53. 	cout << "\n";
  54. if 
  55. 	(input == addAnswer)
  56. 	cout << "Congratulations\n"; 	
  57. else
  58. 	cout << "That is incorrect,\nThe correct answer is: " << addAnswer;
  59. 	cout << "\n";
  60. return 0;
  61. }
  62.  
  63. else if (choice==2)
  64. {
  65. 	cout << setw (6) << sub1 << endl; 
  66. 	cout << "- ";
  67. 	cout << setw (4) << sub2 << endl;
  68. 	cout << "------";
  69. 	cout << "\n";
  70. 	cin >> input; 
  71. 	cout << "\n";
  72. if 
  73. 	(input == subAnswer)
  74. 	cout << "Congratulations\n"; 	
  75. else
  76. 	cout << "That is incorrect,\nThe correct answer is: " << subAnswer;
  77. 	cout << "\n";
  78. return 0;}
  79.  
  80. else if (choice==3)
  81. {
  82. 	cout << setw (6) << multiply1 << endl; 
  83. 	cout << "* ";
  84. 	cout << setw (4) << multiply2 << endl;
  85. 	cout << "------";
  86. 	cout << "\n";
  87. 	cin >> input; 
  88. 	cout << "\n";
  89. if 
  90. 	(input == multiplyAnswer)
  91. 	cout << "Congratulations\n"; 	
  92. else
  93. 	cout << "That is incorrect,\nThe correct answer is: " << multiplyAnswer;
  94. 	cout << "\n";
  95. return 0;}
  96.  
  97. else if (choice==4)
  98. {
  99. 	cout << setw (6) << div1 << endl; 
  100. 	cout << "/ ";
  101. 	cout << setw (4) << div2 << endl;
  102. 	cout << "------";
  103. 	cout << "\n";
  104. 	cin >> input; 
  105. 	cout << "\n";
  106. if 
  107. 	(input == divAnswer)
  108. 	cout << "Congratulations\n"; 	
  109. else
  110. 	cout << "That is incorrect,\nThe correct answer is: " << divAnswer;
  111. 	cout << "\n";
  112. return 0;}
  113.  
  114. else if (choice==5)
  115. 	{cout << "Thanks for playing\n";}
  116.  
  117. else
  118. 	{cout << "You can only select options 1-5, run the program again and select a option 1-5\n";}
  119.  
  120.  
  121. return 0;
  122.  
  123. }
Last edited by davids2004 : Dec 1st, 2008 at 12:33 pm.
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Re: How can I add a loop for this code

  #2  
Dec 1st, 2008
Simply..
//...
char rep='n';
//display the menu and get user's choice
while(tolower(rep)=='n')
{
    //...Menu
    cout<<"repeat? [y/n] : ";
    cin>>rep;
}
return 0; //bye..
.:-cikara21-:.
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Re: How can I add a loop for this code

  #3  
Dec 1st, 2008
[code] while (choice!=5)
{
Your Programme Body

}[\code]

Remember to Intialize Choice With any Number without 5
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Re: How can I add a loop for this code

  #4  
Dec 1st, 2008
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Originally Posted by cikara21 View Post
Simply..
//...
char rep='n';
//display the menu and get user's choice
while(tolower(rep)=='n')
{
    //...Menu
    cout<<"repeat? [y/n] : ";
    cin>>rep;
}
return 0; //bye..


Thanks for the help. Would I put that before the else if part of the code? Also the char rep='n'; needs to go at the top where I clarify everything. Also what would I do if I wanted it to either be a capital or lower case y or n?

Thanks.
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Re: How can I add a loop for this code

  #5  
Dec 1st, 2008 
 while (choice!=5)
{
Your Programme Body

}

Remember to Intialize Choice With any Number without 5
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Re: How can I add a loop for this code

  #6  
Dec 1st, 2008
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Originally Posted by Majestics View Post
[code] while (choice!=5)
{
Your Programme Body

}[\code]

Remember to Intialize Choice With any Number without 5


What?
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Re: How can I add a loop for this code

  #7  
Dec 1st, 2008 
    
      #include <iostream>
   
      #include <cstdlib>
   
      #include <iomanip>
   
      #include <ctime>
   
       
   
      using namespace std;
   
       
   
       
   
      int main ()
         
  
     {
  
      srand((unsigned)time(0));
  
      int add1, add2, sub1, sub2;
  
      int multiply1, multiply2, div1, div2;
  
      int choice=0, input;
  
      add1 = (rand()%500)+1;
  
      add2 = (rand()%500)+1;
  
      sub1 = (rand()%500)+1;
  
      sub2 = (rand()%98)+1;
  
      multiply1 = (rand()%98)+1;
  
     multiply2 = (rand()%8)+1;
  
    div1 = (rand()%500)+1;
  
      div2 = (rand()%8)+1;
  
     int addAnswer = add1 + add2;
  
      int subAnswer = sub1- sub2;
  
      int multiplyAnswer = multiply1 * multiply2;
  
      int divAnswer = div1 / div2;
  
       
  
       
  
          
  
     //Display the menu and get the user's choice
  
      while(choice!=5)
	  {
	  cout << " Geometry Calculator \n\n";
  
      cout << "1. Addition\n";
  
      cout << "2. Subtraction\n";
  
      cout << "3. Multiplication\n";
  
      cout << "4. Division\n";
  
     cout << "5. Quit\n";
  
      cout << "\n";
  
       
  
      cout <<"Enter your choice (1-5): ";
  
      cin >> choice;
  
      cout << "\n";
  
       
  
       
  
      if (choice==1)
  
      {
  
      cout << setw (6) << add1 << endl;
  
      cout << "+ ";
  
      cout << setw (4) << add2 << endl;
  
      cout << "------";
  
      cout << "\n";
  
      cin >> input;
  
      cout << "\n";
  
      if
  
      (input == addAnswer)
  
      cout << "Congratulations\n";
  
      else
  
      cout << "That is incorrect,\nThe correct answer is: " << addAnswer;
  
      cout << "\n";
  
      return 0;
  
      }
  
       
  
      else if (choice==2)
  
      {
  
      cout << setw (6) << sub1 << endl;
  
      cout << "- ";
  
      cout << setw (4) << sub2 << endl;
  
      cout << "------";
  
      cout << "\n";
  
      cin >> input;
  
      cout << "\n";
  
      if
  
      (input == subAnswer)
  
      cout << "Congratulations\n";
  
      else
  
      cout << "That is incorrect,\nThe correct answer is: " << subAnswer;
  
      cout << "\n";
  
      return 0;}
  
       
  
     else if (choice==3)
  
      {
  
      cout << setw (6) << multiply1 << endl;
  
      cout << "* ";
  
      cout << setw (4) << multiply2 << endl;
  
    cout << "------";
  
      cout << "\n";
  
      cin >> input;
  
      cout << "\n";
  
     if
  
      (input == multiplyAnswer)
 
      cout << "Congratulations\n";
 
      else
 
      cout << "That is incorrect,\nThe correct answer is: " << multiplyAnswer;
 
      cout << "\n";
 
      return 0;}
 
       
 
      else if (choice==4)
 
      {
 
      cout << setw (6) << div1 << endl;
 
      cout << "/ ";
 
      cout << setw (4) << div2 << endl;
 
      cout << "------";
 
      cout << "\n";
 
     cin >> input;
 
      cout << "\n";
 
      if
 
      (input == divAnswer)
 
      cout << "Congratulations\n";
 
      else
 
      cout << "That is incorrect,\nThe correct answer is: " << divAnswer;
 
      cout << "\n";
 
      return 0;}
 
       
 
   else if (choice==5)
 
   {cout << "Thanks for playing\n";}
 
       
 
      else
 
     {cout << "You can only select options 1-5, run the program again and select a option 1-5\n";}
 
       }
 
       
 
      return 0;
 
       
 
      }
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Re: How can I add a loop for this code

  #8  
Dec 1st, 2008
I was doing a similair problem, and with some help from people on here found that using a do-while loop with a switch instead of four if statements worked best. Check out the last page for some pointers...
http://www.daniweb.com/forums/thread159343.html
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Re: How can I add a loop for this code

  #9  
Dec 1st, 2008
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Originally Posted by Majestics View Post
cplusplus Syntax (Toggle Plain Text) 
  1.  
  2.       #include <iostream>
  3.  
  4.       #include <cstdlib>
  5.  
  6.       #include <iomanip>
  7.  
  8.       #include <ctime>
  9.  
  10.  
  11.  
  12.       using namespace std;
  13.  
  14.  
  15.  
  16.  
  17.  
  18.       int main ()
  19.  
  20.  
  21.      {
  22.  
  23.       srand((unsigned)time(0));
  24.  
  25.       int add1, add2, sub1, sub2;
  26.  
  27.       int multiply1, multiply2, div1, div2;
  28.  
  29.       int choice=0, input;
  30.  
  31.       add1 = (rand()%500)+1;
  32.  
  33.       add2 = (rand()%500)+1;
  34.  
  35.       sub1 = (rand()%500)+1;
  36.  
  37.       sub2 = (rand()%98)+1;
  38.  
  39.       multiply1 = (rand()%98)+1;
  40.  
  41.      multiply2 = (rand()%8)+1;
  42.  
  43.     div1 = (rand()%500)+1;
  44.  
  45.       div2 = (rand()%8)+1;
  46.  
  47.      int addAnswer = add1 + add2;
  48.  
  49.       int subAnswer = sub1- sub2;
  50.  
  51.       int multiplyAnswer = multiply1 * multiply2;
  52.  
  53.       int divAnswer = div1 / div2;
  54.  
  55.  
  56.  
  57.  
  58.  
  59.  
  60.  
  61.      //Display the menu and get the user's choice
  62.  
  63.       while(choice!=5)
  64. 	  {
  65. 	  cout << " Geometry Calculator \n\n";
  66.  
  67.       cout << "1. Addition\n";
  68.  
  69.       cout << "2. Subtraction\n";
  70.  
  71.       cout << "3. Multiplication\n";
  72.  
  73.       cout << "4. Division\n";
  74.  
  75.      cout << "5. Quit\n";
  76.  
  77.       cout << "\n";
  78.  
  79.  
  80.  
  81.       cout <<"Enter your choice (1-5): ";
  82.  
  83.       cin >> choice;
  84.  
  85.       cout << "\n";
  86.  
  87.  
  88.  
  89.  
  90.  
  91.       if (choice==1)
  92.  
  93.       {
  94.  
  95.       cout << setw (6) << add1 << endl;
  96.  
  97.       cout << "+ ";
  98.  
  99.       cout << setw (4) << add2 << endl;
  100.  
  101.       cout << "------";
  102.  
  103.       cout << "\n";
  104.  
  105.       cin >> input;
  106.  
  107.       cout << "\n";
  108.  
  109.       if
  110.  
  111.       (input == addAnswer)
  112.  
  113.       cout << "Congratulations\n";
  114.  
  115.       else
  116.  
  117.       cout << "That is incorrect,\nThe correct answer is: " << addAnswer;
  118.  
  119.       cout << "\n";
  120.  
  121.       return 0;
  122.  
  123.       }
  124.  
  125.  
  126.  
  127.       else if (choice==2)
  128.  
  129.       {
  130.  
  131.       cout << setw (6) << sub1 << endl;
  132.  
  133.       cout << "- ";
  134.  
  135.       cout << setw (4) << sub2 << endl;
  136.  
  137.       cout << "------";
  138.  
  139.       cout << "\n";
  140.  
  141.       cin >> input;
  142.  
  143.       cout << "\n";
  144.  
  145.       if
  146.  
  147.       (input == subAnswer)
  148.  
  149.       cout << "Congratulations\n";
  150.  
  151.       else
  152.  
  153.       cout << "That is incorrect,\nThe correct answer is: " << subAnswer;
  154.  
  155.       cout << "\n";
  156.  
  157.       return 0;}
  158.  
  159.  
  160.  
  161.      else if (choice==3)
  162.  
  163.       {
  164.  
  165.       cout << setw (6) << multiply1 << endl;
  166.  
  167.       cout << "* ";
  168.  
  169.       cout << setw (4) << multiply2 << endl;
  170.  
  171.     cout << "------";
  172.  
  173.       cout << "\n";
  174.  
  175.       cin >> input;
  176.  
  177.       cout << "\n";
  178.  
  179.      if
  180.  
  181.       (input == multiplyAnswer)
  182.  
  183.       cout << "Congratulations\n";
  184.  
  185.       else
  186.  
  187.       cout << "That is incorrect,\nThe correct answer is: " << multiplyAnswer;
  188.  
  189.       cout << "\n";
  190.  
  191.       return 0;}
  192.  
  193.  
  194.  
  195.       else if (choice==4)
  196.  
  197.       {
  198.  
  199.       cout << setw (6) << div1 << endl;
  200.  
  201.       cout << "/ ";
  202.  
  203.       cout << setw (4) << div2 << endl;
  204.  
  205.       cout << "------";
  206.  
  207.       cout << "\n";
  208.  
  209.      cin >> input;
  210.  
  211.       cout << "\n";
  212.  
  213.       if
  214.  
  215.       (input == divAnswer)
  216.  
  217.       cout << "Congratulations\n";
  218.  
  219.       else
  220.  
  221.       cout << "That is incorrect,\nThe correct answer is: " << divAnswer;
  222.  
  223.       cout << "\n";
  224.  
  225.       return 0;}
  226.  
  227.  
  228.  
  229.    else if (choice==5)
  230.  
  231.    {cout << "Thanks for playing\n";}
  232.  
  233.  
  234.  
  235.       else
  236.  
  237.      {cout << "You can only select options 1-5, run the program again and select a option 1-5\n";}
  238.  
  239.        }
  240.  
  241.  
  242.  
  243.       return 0;
  244.  
  245.  
  246.  
  247.       }


I tried to see what you did and tried it but it did not work.
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Re: How can I add a loop for this code

  #10  
Dec 1st, 2008
Ok I just can not get the loop to work. I tried what was in the second post but it does not work. Please help. I am stuck on the code I already posted.

Thanks.
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