This is script file containing the c++ program code

arraySort.cpp

#include<iostream>
using namespace std;
int sortArray(int[],int);

int main(){
  int mark[]={9,3,5,6,1,5,4,7,1};
  int size=sizeof(mark)/sizeof(int);
  sortArray(mark,size);
  return 0;
}

int sortArray(int mark[],int size){
  for(int i=0;i<size;i++){
    int temp=0;
    for(int j=0;j<size-1;j++){
      if(mark[j] < mark[j+1]){
        temp=mark[j];
        mark[j]=mark[j+1];
        mark[j+1]=temp;
        
      }
    }
  }
  
  for(int k=0;k<size;k++){
  	cout << mark[k]<<" ";
  }
  return 0;
}

swap.cpp

#include<iostream>
using namespace std;
int main(){
  int a=2,b=3;
  cout << "Before swap value of a:" <<a<<" and b:"<<b<<"\n";
  int temp=a;
  a=b;
  b=temp;
  cout << "After swap value of a:"<<a<<" and b:"<<b<<"\n";
  return 0;
}

swapByreference.cpp

#include<iostream>
using namespace std;
//Function declaration/prototype
void swapFunction(int *, int *);

//Call by Reference Example
int main(){
  int a=2,b=3;
  cout << "Before swap value of a:" <<a<<" and b:"<<b<<"\n";
  //Function Calling
  swapFunction(&a,&b);
  return 0;
}
//Function definition
void swapFunction(int *a, int *b){
  int temp=*a;
  *a=*b;
  *b=temp;
  cout << "After swap value of a:"<<*a<<" and b:"<<*b<<"\n";
}

swapByValue.cpp

#include<iostream>
using namespace std;
void swapValue(int,int);

//Call by Value Example
int main(){
  int a=2,b=3;
  cout << "Before swap value of a:" <<a<<" and b:"<<b<<"\n";
  swapValue(a,b);
  return 0;
}
void swapValue(int x,int y){
  int temp;
  temp=x;
  x=y;
  y=temp;
  cout << "After swap value of a:"<<x<<" and b:"<<y<<"\n";
}