want to convert a simple array code in function

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i am trying to convert my code or use as a function here is the code below

C#

#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void main(void)
{
int a[3][3],b[3][3],c[3][3],i,j;
for (i=0;i<=2;i++)
{
    for(j=0;j<=2;j++)
    {
    cout<<"Enter value at a[ "<<i<<" ] [ "<<j<<" ] "<<endl;
    cin>>a[i][j];
    }
}
for (i=0;i<=2;i++)
{
    for(j=0;j<=2;j++)
    {
    cout<<"Enter value at a[ "<<i<<" ] [ "<<j<<" ] "<<endl;
    cin>>b[i][j];
    }
}
for (i=0;i<=2;i++)
{
    for(j=0;j<=2;j++)
    {
    c[i][j]=a[i][j]+b[i][j];
    }
}
for (i=0;i<=2;i++)
{
    for( j=0;j<=2;j++)
    {
//  1
    cout<<c[i][j]<<"  ";
    }
    cout<<endl;
}

getch();
}

////// My code is which i m trying to convert in function//////////

C#

#include<iostream.h>
#include<conio.h>
#include<stdio.h>

int my(int[3][3],int[3][3],int[3][3]);

void main(void)
{
int d=my(int[3][3],int[3][3],int[3][3]);

getch();
}

int my(int a[3][3],int b[3][3],int c[3][3])
{
   for (int i=0;i<=2;i++)
   {
    for (int j=0;j<=2;j++)
    {
    cout<<"Enter a number:"<<endl;
    cin>>a[i][j];
    }
   }


   for (int l=0;l<=2;l++)
   {
    for (int k=0;k<=2;k++)
    {
    cout<<"Enter a number:"<<endl;
    cin>>b[l][k];

//c[l][k]=a[l][k]+b[l][k];
    }
   }


   for (int q=0;q<=2;q++)
   {
    for (int w=0;w<=2;w++)
    {
    int c;
    c[q][w]=a[i][j]+b[l][k];
//cout<<c[q][w]<<"  "<<endl;
    }
   }
   for(q=0;q<=2;q++)
   {
    for(w=0;w<=2;w++)
    {
    cout<<c[q][w]<<" ";
    }
    cout<<endl;
   }
}

Posted 7-Jan-13 22:30pm

Member 9411249

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Comments

Richard MacCutchan 8-Jan-13 4:38am

What exactly are you trying to do? Most of this code is difficult to understand so it is also difficult to make any suggestions.

Argonia 8-Jan-13 4:39am

You have to return a value with the same type of the function if its different from void

2 solutions

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CPallini · Answer 1 · 2013-01-07T22:58:00

A possibly nicer version of your program:

C++

#include<iostream.h>
#include<stdio.h>

void input_array(const char * name, int v[3][3]);
void output_array(const char *name, int v[3][3]);
void sum_array(int[3][3],int[3][3],int[3][3]);

int main(void)
{
  int a[3][3], b[3][3], c[3][3];

  input_array("a", a);
  input_array("b", b);

  sum_array(a,b,c);

  output_array("a", a);
  output_array("b", b);
  output_array("c", c);

  getchar();
  return 0;
}

void input_array(const char * name, int v[3][3])
{
  for (int i=0; i<3; i++)
    for (int j=0; j<3; j++)
    {
      cout<< name << "[" << i << "][" << j << "],  enter a number:"<< endl;
      cin>>v[i][j];
    }
}
void output_array(const char * name, int v[3][3])
{
  cout << name << " = {";

  for (int i=0; i<3; i++)
  {
    if ( i ) cout << ", ";
    cout << "{ ";
    for (int j=0; j<3; j++)
    {
      if ( j ) cout << ", ";
      cout << v[i][j];
    }
    cout << "}";

  }
  cout << "}" << endl;
}

void sum_array(int a[3][3],int b[3][3],int c[3][3])
{
   for (int i=0;i<=2;i++)
    for (int j=0;j<=2;j++)
      c[i][j]=a[i][j]+b[i][j];
}

By the way: you are apparently using an old C++ compiler. Couldn't use a more updated one?

qPCR4vir · Answer 2 · 2013-01-07T23:11:00

Solution 2

your homework?
You need to see/decide what are the "communality" you find in your code, or just part with are better organized into a funtion. Could be: enter3x3, summe3x3, print3x3 ??

Posted 7-Jan-13 23:11pm

qPCR4vir

Comments

Member 9411249 8-Jan-13 6:43am

no its not my home work i am preparing for my test and i will not use pointers for finding 2d array

qPCR4vir 8-Jan-13 7:07am

OK. Anyway, meanwhile, the CPallini´s solution shows exactly what I mean: convert your main function into a call to 3 “reusable” functions: for input, sum and output.