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Please help me to solve C++ program in array

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Please help me to solve C++ program in array

 
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  #1
Feb 1st, 2008
Please help me to solve the following program in C++ array. After compile message appears "Possible use of "i" before definition.
c++ Syntax (Toggle Plain Text) 
  1. #include<iostream.h>
  2. #include<conio.h>
  3. void selsort(int [],int);
  4. void main()
  5. {
  6. int AR[50],N,z;
  7. clrscr();
  8. cout<<"How many elements do U want to create array with?(max.50).....";
  9. cin>>N;
  10. cout<<"\n Enter Array elements.....\n";
  11. for(int i=0;i<N;i++)
  12. {
  13. cin>>AR[i];
  14. }
  15. selsort(AR,N);
  16. cout<<"\n\n The sorted array is as shown below.....\n";
  17. for(int i=0;i<N;i++)
  18. cout<<AR[i]<<" ";
  19. cout<<endl;
  20. cin>>z;
  21. }
  22. void selsort(int AR[],int size)
  23. {
  24. int small,pos,tmp,i;
  25. for(int i=0;i<size;i++)
  26. {
  27. small=AR[i]; pos=i;
  28. }
  29. for(int j=(i+1);j<size;j++)
  30. {
  31. if(AR[j]<small)
  32. {
  33. small=AR[j];
  34. pos=j;
  35. }
  36. }
  37. tmp=AR[i];
  38. AR[i]=AR[pos];
  39. AR[pos]=tmp;
  40. cout<<"\n Array after pass-"<<(i+1)<<"-is:\n";
  41. for(int j=0;j<size;j++)
  42. cout<<AR[j]<<" ";
  43. }
Thank you in advance.
Last edited by Ancient Dragon; Feb 4th, 2008 at 1:04 am. Reason: add code tags
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Re: Please help me to solve C++ program in array

 
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  #2
Feb 1st, 2008
C++ Syntax (Toggle Plain Text) 
  1. ...
  2. void selsort(int AR[],int size)
  3. {
  4. int small,pos,tmp,i;
  5. for(int i=0;i<size;i++)
  6. {
  7. ....

if you declared i before, you don't need to do it in the loop.

C++ Syntax (Toggle Plain Text) 
  1. ...
  2. void selsort(int AR[],int size)
  3. {
  4. int small,pos,tmp;
  5. for(int i=0;i<size;i++)
  6. {
  7. ...

Hope You'll find this information helpful.
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Re: Please help me to solve C++ program in array

 
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  #3
Feb 1st, 2008
C++ Syntax

Thanks for your reply but i could not get the resolve. Need help.
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Re: Please help me to solve C++ program in array

 
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  #4
Feb 1st, 2008
Your error is you did not define "i" out of for loops and u are trying to use it before defining it. When u define a variable (like i) in a for loop it's scope finishes at the end of for loop.

You must define an "i" out of for loop to use it after.
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Re: Please help me to solve C++ program in array

 
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  #5
Feb 2nd, 2008
c++ Syntax (Toggle Plain Text) 
  1. #include<iostream.h>
  2. #include<conio.h>
  3. void selsort(int [],int);
  4. void main()
  5. {
  6. int AR[50],N,z;
  7. clrscr();
  8. cout<<"How many elements do U want to create array with?(max.50).....";
  9. cin>>N;
  10. cout<<"\n Enter Array elements.....\n";
  11. for(int i=0;i<N;i++)
  12. {
  13. cin>>AR[i];
  14. }
  15. selsort(AR,N);
  16. cout<<"\n\n The sorted array is as shown below.....\n";
  17. for(int i=0;i<N;i++)
  18. cout<<AR[i]<<" ";
  19. cout<<endl;
  20. cin>>z;
  21. }
  22. void selsort(int AR[],int size)
  23. {
  24. int small,pos,tmp,i;
  25. for(int i=0;i<size;i++)
  26. {
  27. small=AR[i]; pos=i;
  28. for(int j=(i+1);j<size;j++)
  29. {
  30. if(AR[j]<small)
  31. {
  32. small=AR[j];
  33. pos=j;
  34. }
  35. }
  36. }
  37. tmp=AR[i];
  38. AR[i]=AR[pos];
  39. AR[pos]=tmp;
  40. cout<<"\n Array after pass-"<<(i+1)<<"-is:\n";
  41. for(int j=0;j<size;j++)
  42. cout<<AR[j]<<" ";
  43. }
Last edited by Ancient Dragon; Feb 4th, 2008 at 1:06 am. Reason: add code tags
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Re: Please help me to solve C++ program in array

 
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  #6
Feb 4th, 2008
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Originally Posted by anand.vicky24 View Post
#include<iostream.h>
#include<conio.h>
void selsort(int [],int);
void main()
{
int AR[50],N,z;
clrscr();
cout<<"How many elements do U want to create array with?(max.50).....";
cin>>N;
cout<<"\n Enter Array elements.....\n";
for(int i=0;i<N;i++)
{
cin>>AR[i];
}
selsort(AR,N);
cout<<"\n\n The sorted array is as shown below.....\n";
for(int i=0;i<N;i++)
cout<<AR[i]<<" ";
cout<<endl;
cin>>z;
}
void selsort(int AR[],int size)
{
int small,pos,tmp,i;
for(int i=0;i<size;i++)
{
small=AR[i]; pos=i;
for(int j=(i+1);j<size;j++)
{
if(AR[j]<small)
{
small=AR[j];
pos=j;
}
}
}
tmp=AR[i];
AR[i]=AR[pos];
AR[pos]=tmp;
cout<<"\n Array after pass-"<<(i+1)<<"-is:\n";
for(int j=0;j<size;j++)
cout<<AR[j]<<" ";
}
you're "i" has a multiple declaration.. please check it
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OOP

 
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  #7
Oct 8th, 2009
plz write a program for rational numbers in oop,that can give sum,difference,product n division of two rational numbers.
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  #8
Oct 8th, 2009
C++ Syntax (Toggle Plain Text) 
  1.  
  2. for(int i=0;i<N;i++)
  3.  
  4. cout<<AR[i]<<" ";
  5.  
  6. cout<<endl;
  7.  
  8. cin>>z;
  9.  
  10. }

This part of the code is missing a curly bracket that might be it..
line 17.

//k0ns3rv
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