#include
int main ()
{
int X,Y, i=5;
Y=1;
X=2;
while (X >=1)
do {
for (i = 0;i < 5;i++)
switch (i) {
case 1: Y = X + 7; break;
case 2: X = Y + 8;
case 4: X = X - Y; break;
default:X = X + Y;
Y = Y + X;
printf( " X is %d\n" , X);
printf( " Y is %d\n" , Y);
}
printf( "X is %d\n" , X);
printf( "Y is %d\n" , Y);
}
while (Y < 5);
getche ();
return 0;
}

OUTPUT;
X is 3
Y is 4
X is 18
Y is 28
X is -10
Y is 28