Original parameters were num$1,$ num$2,$ num$3.$ Original code was:

int sum;

sum $=($num$1*$ num$1)+($num$2*$ num$2)+($num$3*$ num$3)$;

return sum;

New parameters are num$1,$ num$2,$ num$3,$ num$4.$ Find the error in the copy$-$pasted new code below.