SIMPLE EXAMPLE OF PROCESS HEADER FILE

Write a simple program of addition,multiplication,subtraction and division using process header file :)))

 

#include<iostream.h>
#include<conio.h>
#include<process.h>
int add(int a,int b)
{
    int sum;
    sum=a+b;
    return sum;
}
int sub(int a,int b)
{
    int sum;
    sum=a-b;
    return sum;
}
int mul(int a,int b)
{
    int sum;
    sum=a*b;
    return sum;
}
int div(int a,int b)
{
    int sum;
    sum=a/b;
    return sum;
}
void main()
{
    int m,n,sum,ch;
    clrscr();
    cout<<"\n 1. Addition \n 2. Subtraction \n 3. Multiplication \n 4. Division \n 5. Exit";
    P:
    cout<<"\n Enter the choice: ";
    cin>>ch;
    switch(ch)
    {
        case 1:
        cout<<"\n Enter M: ";
        cin>>m;
        cout<<"\n Enter N: ";
        cin>>n;
        sum=add(m,n);
        cout<<"\n Addition= "<<sum;
        goto P;

        case 2:
        cout<<"\n Enter M: ";
        cin>>m;
        cout<<"\n Enter N: ";
        cin>>n;
        sum=sub(m,n);
        cout<<"\n Subtraction= "<<sum;
        goto P;

        case 3:
        cout<<"\n Enter M: ";
        cin>>m;
        cout<<"\n Enter N: ";
        cin>>n;
        sum=mul(m,n);
        cout<<"\n Multiplication= "<<sum;
        goto P;

        case 4:
        cout<<"\n Enter M: ";
        cin>>m;
        cout<<"\n Enter N: ";
        cin>>n;
        sum=div(m,n);
        cout<<"\n Division= "<<sum;
        goto P;

        case 5:
        exit(0);
    }
getch();
}

Here is the output :)))