Print second line equation
if ( f > 0 && 1 + tan ( x ) * given_slope != 0 ) { cout << " y ▁ = ▁ " << slope_2 << " x ▁ + " << f << endl ; } if ( f <= 0 && 1 + tan ( x ) * given_slope != 0 ) cout << " y ▁ = ▁ " << slope_2 << " x ▁ " << f << endl ; }