Pointer005

Input three numbers in main function calculate there sum & average in a user defined function and print the result in the main function.

#include <stdio.h>
#include <conio.h>
void sumavg ( int   n1, int    n2, int    n3, int*s, float*avg )
{              
        *s = n1 + n2 + n3;
        *avg = ( *s ) / 3.0;
}                   
             
void main ( )
{                           
        int          n1, n2, n3, s = 0;
        float       avg;
        clrscr ( );
        printf("\n\n\n\t\t Enter 1st number..:"); scanf("%d",&n1);
        printf("\n\t\t Enter 2nd number..:"); scanf("%d",&n2);
        printf("\n\t\t Enter 3rd number..:"); scanf("%d",&n3);
        sumavg ( n1, n2, n3, &s, &avg );
        printf("\n\n\n\t\t Sum = %d",s);
        printf("\n\t\t Average = %f",avg);
        getch();
}

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Pointer004

Input some elements in an array and copy that array into another array using pointer.

#include <stdio.h>
#include <conio.h>
void input ( int    arr[], int    l )
{                         
       int    i;
       for ( i = 0; i < l; i++ )
       {                 
                 printf("\n\t\t Enter a number..:"); scanf("%d",arr+i);
       }
}                        
                         
void print ( int    arr[], int    l )
{                   
        int    i;
        for ( i = 0; i < l; i++ )
        {                                 
                 printf("%d, ", *(arr+i) );
        }                       
}                

void copy ( int    brr[], int    arr[], int    l )
{                              
        int    i;
        for ( i = 0; i < l; i++ )
        {                                  
                 *( brr +i ) = *( arr + i );
        }
}                        
                       
void main ( )
{                                
        int     arr[10], brr[10];
        clrscr ( );
        input ( arr, 10 );
        printf("\n\n\n The array is..:");
        print ( arr, 10 );
        copy ( brr, arr, 10 );
        printf("\n\n The copied array is..:");
        print ( brr, 10 );
        getch ( );
}

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Pointer003

Input two numbers and swap them.

#include<stdio.h>
#include<conio.h>
void swap ( int*, int* );
void main ( )
{                  
        int      m, n;
        clrscr ( );
                                     
        printf("\n\n\n\t\t   Enter 1st number..:"); scanf("%d",&m);
        printf("\n\t\t   Enter 2nd number..:"); scanf("%d",&n);
                                
        swap ( &m, &n );
        printf("\n\n\n\n\t\t -- Values after swapping --");
        printf("\n\n\t\t      First value   = %d",m);
        printf("\n\t\t      Second value = %d",n);
        getch ( );
}                           
                   
void swap ( int     *p, int     *q )
{                 
        int     t;
        t = *p;
        *p = *q;
        *q = t;
}

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Pointer002

Input some numbers in an array. Print the array using pointer.

#include <stdio.h>
#include <conio.h>
void print ( int    arr[], int    l)
{                         
        int i;
        for ( i = 0; i < l; i++ )
        {                             
                 printf("%d, ",*(arr+i));
        }
}
                                                      
void main ( )
{                       
        int    arr[10], i;
        clrscr ( );
        for ( i = 0; i < 10; i++ )
        {                                       
                 printf("\n\t\t\t Enter a number..:");    scanf("%d",&arr[i]);
        }
        printf("\n\n\t The array is..:");
        print ( arr, 10 );
        getch ( );
}

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Pointer001

Concept of pointer.

#include <stdio.h>
#include <conio.h>
void main ( )
{           
        int       n, *p;
        p = &n;
        n = 5;
        clrscr ( );
                       
        printf("\n\n\n\t\t Number is %d Stored at Address %u", n, &n );
        printf("\n\n\t\t Number is %d Stored at Address %u", *p, p );
        printf("\n\n\t\t Address is %u Stored at Address %u", p, &p );
                       
        getch ( );
}

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