c++ cointoss help neede plzzzzzzz

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c++ cointoss help neede plzzzzzzz

 
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  #1
Sep 20th, 2009
i'm supposed to write a program that simulates cointoss. for each toss the program should print heads or tails and it would toss 100 times and counts the number off times each side of the coin appears. it should also call a seperate function 'flip' that takes no argument and returns 0 for tails and 1 for heads. pease help meeee its due today. this is what i have so far:

C++ Syntax (Toggle Plain Text) 
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4. //#include <stdafx.h>
  5. #include <iostream>
  6. #include <cstdlib>
  7.  
  8. using std::cout;
  9. using std::rand;
  10.  
  11. int flip();
  12.  
  13. int main(void)
  14. {
  15.  
  16. 	int heads = 1;
  17. 	int tails = 0;
  18. 	int coinToss = 100;
  19. 	int face;
  20.  
  21.     for (int toss = 0; toss < coinToss; toss++)
  22.     {
  23. 	    flip();
  24.         if (toss == 1)
  25.  
  26. 			heads++;
  27.  
  28. 		else
  29.  
  30. 			tails++;
  31.  
  32.      }
  33. 	printf("%s%5s\n", "face", " heads or tails");
  34. 	printf(" heads%5d\n",   heads);
  35. 	printf(" tails%5d\n",   tails);
  36.  
  37.  
  38.     int flip()
  39.     {
  40.       return rand() % 2;
  41.  
  42. 	}
  43. }
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Re: c++ cointoss help neede plzzzzzzz

 
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  #2
Sep 20th, 2009
Great, you've got some code, and what exactly is your question?
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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Re: c++ cointoss help neede plzzzzzzz

 
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  #3
Sep 20th, 2009
i keep getting errors when i execute it and i don't get what i want. also it doesn't call the flip function that gives me 0 for tail and 1 for heads. i need to know if the code is correct.
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Re: c++ cointoss help neede plzzzzzzz

 
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  #4
Sep 20th, 2009
You have forgotten to use the return value of flip(). If you did this
if (flip()==1) . I think you would be a lot better than looking at your loop count varible.

If really helps lots to run you code on paper, with a list of variables when the code is small and you are beginning. They you would see why you only get one head.

It also helps to printout the results every turn.
experience is the most expensive way to learn anything
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Re: c++ cointoss help neede plzzzzzzz

 
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  #5
Sep 20th, 2009
First seed your rand function.
C++ Syntax (Toggle Plain Text) 
  1.     srand(time(0));

The this code :
C++ Syntax (Toggle Plain Text) 
  1. for (int toss = 0; toss < coinToss; toss++)
  2.     {
  3. 	    flip();
  4.         if (toss == 1)
  5.  
  6. 			heads++;
  7.  
  8. 		else
  9.  
  10. 			tails++;
  11.  
  12.      }

is wrong.

You need to assign the value return to a variable and then use it to compare.
C++ Syntax (Toggle Plain Text) 
  1. for(int i = 0; i < 100; i++)
  2. {
  3.     int side = flip();
  4.    if(side == 0) tails++;
  5.    else heads++;
  6. }
1) Prove that the area of a circle is pi*r^2, where "r" is the radius of the circle.
2) Problem 2[b]solved by : jonsca
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Re: c++ cointoss help neede plzzzzzzz

 
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  #6
Sep 20th, 2009
also you are starting the variable heads at one which will throw off you answer. you should initialize both heads and tails as 0.
if you write using namespace std; you do not need to write std::something in your program.
If your thread is solved please mark it as solved
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