check the following Program has errors or not. if iat is correct would be the outlut of the Progrom?

int num $=1$

Switch num $$2$

$$

Case $1$: $nmx=4$;

Coutecnumerend ;$3$

case $2$: num $**=4$;

Coutec num ccendl;

Case $3$:

$u\frac{m}{?}=2$;

cout c$\%=2$;

cout sum