steenrod% g++ -o trap-5 -lm trap-5.cc
steenrod% trap-5
Program approximates the area under several functions using the Trapezoidal Rule.
Enter number of subintervals to be used: 100

Approximation of 1/4 area of circle of radius 2 is 3.14042

Approximation of area under y = x^2 between 1 and 3 is 8.6668