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program file_03
implicit none
integer :: no_of_students, roll_no, age, fd, i
character(len = 20) :: first_name, last_name
real :: weight
! for asserting/verification
integer :: total_age = 0
real :: total_weight = 0.0
fd = 10
open(fd, file="file_03_data.txt")
read(fd, *) no_of_students
print *, "Total no of students is:", no_of_students
do i = 1, no_of_students
read(fd, *) roll_no, first_name, last_name, age, weight
print *, roll_no, first_name, last_name, age, weight
total_age = total_age + age
total_weight = total_weight + weight
end do
print *, "total_age:", total_age
print *, "total_weight:", total_weight
if (total_age /= 150) error stop
if (abs(total_weight - 519.600037) > 1e-6) error stop
end program
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