C++ program to demonstrate call by reference

// call by reference in c++
#include<iostream.h>

#include<conio.h>

void swap(int * ,int *);

void main()

{

          int a,b;

          cout<<"Enter the value for a and b: ";

          cin>>a>>b;

          swap(&a,&b);

          cout<<"Values after swapping A= "<<a<<" B= "<<b;

          getch();

}

void swap(int *p1,int *p2)

{

          int t;

          t=*p1;

          *p1=*p2;

          *p2=t;

}

C++ program to demonstrate call by reference

C++ program to demonstrate call by value

//call by value method in c++
#include<iostream.h>

#include<conio.h>

int cube(int);

void main()

{

          int n;

          cout<<"Enter the number";

          cin>>n;

          n=cube(n);

          cout<<"Cube of the number is:"<<n;

          getch();

}

int cube(int n)

{

          n=n*n*n;

          return n;

}

Output

C++ program to demonstrate call by value

C++ program to find the vowels and consonants in a string

#include<iostream.h>

#include<conio.h>

void main()

{

char a[25],*p[25],v[25],c[25];

int i,j,k=0,l=0;

cout<<"Enter the string\n\n";

cin>>a;

for(i=0;a[i]!='\0';i++)

{

p[i]=&a[i];

}

p[i]=&a[i];

for(i=0;*p[i]!='\0';i++)

{

if(*p[i]=='a'||*p[i]=='e'||*p[i]=='i'||*p[i]=='o'||*p[i]=='u')

{

v[k]=*p[i];

k++;

}

else

{

c[l]=*p[i];

l++;

}

}

v[k]='\0';

c[l]='\0';

cout<<"\n\nVowels\n\n";

for(i=0;v[i]!='\0';i++)

{

cout<<v[i]<<" ";

}

cout<<"\n\nConsonents\n\n";

for(i=0;c[i]!='\0';i++)

{

cout<<c[i]<<" ";

}

getch();

}

C++ program to find the vowels and consonants in a string