- 1)
- (1 pt) The data file
`trap.in`contains a table of values for some unknown function. Write a program that will count the number of lines in the data file. - 2)
- (6 pts) You will need the answer from Problem 1 to do this problem.
Write a program that will use one loop to read in the data values in
`trap.in`into two array variables. This loop should look something like:DO i = 1,..... READ(*,*) x(i),y(i) ENDDO

In a second loop, compute the area under the function using the trapezoidal rule. Could you use Simpson's rule for this problem? Why or why not? - 3)
- (3 pts) Write a program that will swap two variables. For example,
suppose you declare
*a*and*b*to be integers and set*a*= 5 and*b*= -9. When your program terminates, the value of*a*should be -9 and the value of*b*should be 5. Your program should work for any values of*a*and*b*.

2017-11-01