What is wrong and what is missing in this code?
PROGRAM area_sin_monte_carlo
USE nrtype
USE nrutil
USE ran_state, ONLY: ran_seed
USE nr, ONLY: ran1
IMPLICIT none
INTEGER, PARAMETER :: u_file = 1, angle_i = 0.0, angle_f=pi, p= 5000
REAL, PARAMETER :: v_angle = (angle_f - angle_i)/REAL(p)...