The Trapezoidal Rule for C programming C++ question. Anyone knows?

[Kev ave]

I am new to C programming. Anyone has the code for this problem below or how to do it?

I am trying to write a program in Putty that using Trapezoidal rule that reads a,b and N then calculates approx area for this function f(x)= 2x^2 +x

[Gania]

Hello if you are having code then please post here so I can try to find bug with that code. it will helpful for us to answer for you if you provide me a code. so please first post your code here. and please specify what kind of output you require and what output you are getting. so its easy for me to rewrite that code.