Pointer in C/C++ - Exersice 1

Pointer in C/C++ - Exersice 1

1. Write a C++ function to sort an array of ten integer values in ascending order. The function will accept two arguments-- a pointer th... 9 years ago

1. Write a C++ function to sort an array of ten integer values in ascending order.

The function will accept two arguments-- a pointer that points to the array and the array size. The function returns a pointer that points to the sorted array.

Solution:

#include<iostream> 
#include<conio.h> 
using namespace std; 
int *sortAsc(int *p, int size); 
   int main() 
    { 
     int arr[]={23,34,2,3,5,12,42,56,89,8}; 
     int *p=sortAsc(arr,10); 
     //output the sorted array 
     int i; 
     for(i=0;i<10;i++) 
       cout<<*(p+i)<<endl; 
        getch(); 
     return 0; 
      } 
int *sortAsc(int *p, int n){ 
    int i,j; 
    for(i=0;i<n;i++) 
        for(j=i+1;j<n;j++) 
            if(*(p+j)<*(p+i)) 
              { 
                int temp=*(p+j); 
                *(p+j)=*(p+i); 
                *(p+i)=temp; 
                } 
   return p; 
}

 2. Modify the solution of exercise 1 in order to sort the array in descending order.

Solution:

#include<iostream> 
#include<conio.h> 
using namespace std; 
int *sortAsc(int *p, int size); 
   int main() 
  { 
     int arr[]={23,34,2,3,5,12,42,56,89,8}; 
     int *p=sortAsc(arr,10); 
     //output the sorted array 
     int i; 
     for(i=0;i<10;i++) 
       cout<<*(p+i)<<endl; 
       getch(); 
     return 0; 
      } 
 int *sortAsc(int *p, int n){ 
    int i,j; 
    for(i=0;i<n;i++) 
        for(j=i+1;j<n;j++) 
            if(*(p+j)>*(p+i)) 
              { 
                int temp=*(p+j); 
                *(p+j)=*(p+i); 
                *(p+i)=temp; 
                } 
   return p; 
}