Array with names

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Array with names

 
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  #1
Oct 5th, 2004
As this is my first post on this forum I want to say "Hello!" to everybody and I hope that we'll help each other as much as we can and we'll be very good friends.

So, this is my problem ( a rather simple one but I don't know how to resolve it ) : I found a exercise that wants me to have a array with some student's names and another array with their grades ( numerical grades ) at informatics. :eek:

Example: X=('John','Michelle','Jack','Robert'); Y=(10,5,6,7);

My question is: how do I put those names in the array so that a name ( let's say John ) should occupy a single position? For example: X[1]= 'John'; X[2]='Michelle' , etc. I have to read them from the keyboard , of course.

Thank you very much for your time and eventual help!
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Re: Array with names

 
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  #2
Oct 5th, 2004
Hi djextazy,
Well come to DaniWeb ,
if u want to have full name at one location of the array
u have to declare array as a two dimensional array,
i-e its declaration would be like this
char [][];
or u can also use array of pointers , but if u r new to C++ u should use
two dimension array
I hope it resolved ur issue but still if their is some problem feel free to ask again.
Fahad
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Re: Array with names

 
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  #3
Oct 5th, 2004
Hi,
The declaration should be like this
char X[][];

Fahad
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Re: Array with names

 
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  #4
Oct 5th, 2004
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Originally Posted by fahad
Hi,
The declaration should be like this
char X[][];

Fahad
Do you mean something like
a[1][1] = "Victor";
a[2][2] = "Jose"; ???

I mean:
char a[30][30],i,n;
cout<<"n= "; cin>>n;
for(i=1;i<=n;i++) { cout<<"Give "<<i<<"-st name: "; cin>>a[i]; }

Correct me please if I am mistakening. Thank you for your help!
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Re: Array with names

 
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  #5
Oct 5th, 2004
Hi,
Yes u r right ,
try this............and if still getting some problems discuss it again
Fahad
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Re: Array with names

 
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  #6
Oct 5th, 2004
An array of size N will be indexed from 0 to N-1. The standard idiomatic for loop is then like this:
for ( int i = 0; i < N; ++i )
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Re: Array with names

 
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  #7
Oct 5th, 2004
It works , altought the exercise says that I should use two arrays , one for the names and one for the grades. Oh well , it's important that it works ...

Thank you very much!
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Re: Array with names

 
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  #8
Oct 5th, 2004
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Originally Posted by Dave Sinkula
An array of size N will be indexed from 0 to N-1. The standard idiomatic for loop is then like this:
for ( int i = 0; i < N; ++i )
It works fine as for(i=1;i<=n;i++) . Trust me. :lol:
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Re: Array with names

 
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  #9
Oct 5th, 2004
>It works fine as for(i=1;i<=n;i++) .
Yes it does. But then again, so does this:
C Syntax (Toggle Plain Text) 
  1. i = 9;
  2. loopie:
  3.   // Do stuff
  4.   if ( --i > 9 - n )
  5.     goto loopie;
Most programmers prefer to use the idiomatic approach because it's easier to use, easier to get used to, and common enough that you don't have to get used to something else everytime you read a different person's program.
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Re: Array with names

 
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  #10
Oct 5th, 2004
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Originally Posted by djextazy
It works fine as for(i=1;i<=n;i++) . Trust me. :lol:
Do you see the bug here?
C Syntax (Toggle Plain Text) 
  1. #include <stdio.h>
  2.  
  3.  #define N 10
  4.  
  5.  int main()
  6.  {
  7.     int i, array[N] = {1,2,3,4,5,6,7,8,9,10};
  8.     for ( i = 1; i <= N; ++i )
  9.     {
  10.  	  printf("array[%d] = %d\n", i, array[i]);
  11.     }
  12.     return 0;
  13.  }
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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