IOSTREAM

#include < iostream.h >
#include < conio.h >
void main()
{
int number1,number2;
float x,y,z;
number1=20;
number2=30;
x=25.25; y=30.05; z=10.75;
clrscr();
cout<< "Program Display Mathmetic calculation"<< endl;
cout<< "number1 = " << number1 << endl;
cout<< "number2 = " << number2 << endl;
cout<< "number1 + number2 = "<< number1+number2 << endl;
cout<< "number1 - number2 = "<< number1-number2 << endl;
cout<< "x+y+z = "<< x+y+z << endl;
cout<< "x*y*z = " << x*y*z << endl;
cout<< "50*25*12.5 = " << 50*25*12.5 << endl;
getch();
}