Program to understand pointer passed to function.

using codeblocks
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//program to pick the greatest number using pointer passed to function
#include <stdio.h>            //header file
void max_number(int a[],int *);
int main()
{
    int a[100];                 //array declaration
    int i;
    int total;                   //variables declaration
    printf("enter value of total\n");
    scanf("%d",&total);              //input of total value of array
    printf("enter elements of array\n");
    for(i=0;i<total;i++)                   //execution of loop
    {
        printf("enter value for location=%d\t",i);
        scanf("%d",a+i);                  //input of element using array. here array acts as pointer.
                                          //It gets input using address starting from location 0.
    }
    max_number(a,&total);                //calling the function with passing of array and pointer
    return 0;
}
void max_number(int a[],int*p)
{
    int i,max;
    max=*(a+0);                          //It stores value stored in location 0

    for(i=0;i<*p;i++)                    //value of pointer being used
    {
       if(max<*(a+i))                   //comparison takes place
       {
         max=*(a+i);                    //assigning value
       }
    }
    printf("max value=%d",max);       //display of maximum value

}

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using turbo c++

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//program to pick the greatest number using pointer passed to function

#include <stdio.h>            //header file

#include<conio.h>

void max_number(int a[],int *);

int main()

{

    int a[100];                 //array declaration

    int i;

    int total;                   //variables declaration

    printf("enter value of total\n");

    scanf("%d",&total);              //input of total value of array

    printf("enter elements of array\n");

    for(i=0;i<total;i++)                   //execution of loop

    {

        printf("enter value for location=%d\t",i);

        scanf("%d",a+i);                  //input of element using array. here array acts as pointer.

                                          //It gets input using address starting from location 0.

    }

    max_number(a,&total);                //calling the function with passing of array and pointer

   getch();

    return 0;

}

void max_number(int a[],int*p)

{

    int i,max;

    max=*(a+0);                          //It stores value stored in location 0

    for(i=0;i<*p;i++)                    //value of pointer being used

    {

       if(max<*(a+i))                   //comparison takes place

       {

         max=*(a+i);                    //assigning value

       }

    }

    printf("max value=%d",max);       //display of maximum value

}