what is the problem in this code? solve!

[shabby]

#include<iostream.h>
void sort(int A[20],int N)
{
int i,j, temp;
for (i=0;i<N;i++)
{
for(j=i+1;j<N;j++)
{
if(A[i]>A[j])
{
temp=A[i];
A[i]=A[j];
A[j]=temp;
}
cout<<A[i-1];
}
}
void main()
int A[20], i, j, N;
cout<<"enter no. of elements";
cin>>N;
cout<<"enter array";
for(i=0;i<N;i++)
{
cin>>A[i];
sort(A[20], N);
}

[Marcan]

Well, I don't think anyone would want to rewrite the code for you...

But here's a couple of pointers:

1-It isn't standard anymore for main to return void. Return an int instead.

int main()
{
//code goes here
}

2-iostream.h is a deprecated header. use <iostream> instead (you should probably change your IDE)

3-Your code is all wrong. Right after your void main() (remember to use int main) there should a { immediately following it.

4-Use the code tags here in the forum to post code, just like so:

int main()
{
//code goes here
}

[TheIdeasMan]

It would also be helpful if you posted compiler errors.

[Longazan]

Maybe it is because of my incompetence but I have never seen a function that has an array as a parameter be declared the way you did. I mostly see something like this

void sort(int Array[], int N)

And when call the function only the name of the array is pass in

sort(A, N)

[usandfriends]

#include <iostream>

main()
{
	int A[20];
	int i, j, N;
	std::cout<<"enter no. of elements";
	std::cin>>N;
	std::cout<<"enter array";
	for(i=0;i<N;i++)
	{
		std::cin>>A[i];
		
		int i,j, temp;
		for (i=0;i<N;i++)
		{
			for(j=i+1;j<N;j++)
			{
				if(A[i]>A[j])
				{
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			std::cout<<A[i-1];
			}
		}
	}
}

Okay, I made your code compilable, but that doesn't mean it works as it should.

1. Line 5: You call an array with 20 values in it, but then you ask for the N value. If I put in any value above 20, your program will throw away the last N-20 values. I suggest you wait until the user enters a N value, then call an array[N];.

2. Line 25: You are showing users the values already, so the output gets all messed up.

3. Everywhere: Your program is not very user friendly. Format your questions and comments so your program looks elegant. Example: instead of std::cout<<"enter array";, you should put std::cout<<"Enter array item "<<i<<": ";. In this case, the user knows how many items he/she has entered and it looks clean and correct.

Now, take a look at my code, which I made just a few days ago:

/*
 * File: bubblesort.c
 * ------------------------
 * Bubble sorts an integer array.
 */

#include <iostream>

main()
{
      int n,tmp,i,j,k,reckon;
      reckon=0;
      
      std::cout<<"This program uses the bubble sort method to sort an integer array.\n";
      std::cout<<"How long is your list?  ";
      std::cin>>k;
      std::cin.ignore();
      
      int array[k];
      
      std::cout<<"\n\n";
      
      for(i=0;i<k;i++)
      {
            std::cout<<"Item number "<<i+1<<":  ";
            std::cin>>array[i];
            std::cin.ignore();
  	  }
      
      while(reckon<=k)
      {
            reckon++;
            for(n=1;n<k;n++)
            {
                  if(array[n]>array[n-1])
                  {
					    ;
				  }
                  else
                  {
                        tmp=array[n];
                        array[n]=array[n-1];
                        array[n-1]=tmp;
                  }
            }
      }
      
      std::cout<<"\n\n";
      
      for(j=1;j<=k;j++)
      {
            std::cout<<"Sorted item number "<<j<<" = "<<array[j-1]<<"\n";
      }
}

Use this only as an example (1. It is extensive. 2. It uses up quite some memory). Although my code is longer, a sample run shows its user-friendliness:

This program uses the bubble sort method to sort an integer array.
How long is your list?  5

Item number 1:  13
Item number 2:  12
Item number 3:  -5
Item number 4:  17
Item number 5:  12

Sorted Item number 1 = -5
Sorted Item number 2 = 12
Sorted Item number 3 = 12
Sorted Item number 4 = 13
Sorted Item number 5 = 17

It is good to tell your user what the program does. Then, prompt the user in a friendly way. Give them information so they can understand it.

Also, the other are right about forum posting: include code tags and other formatting optio_n^s to make your threads more readable and understandable. The more information you give us, the more we are equipped to help you.

Well, that's all!
Good luck and happy coding!
~Usandfriends