hey all........... Im doing an assignment for college and i need help writing a simple program for C++ its writing a program to calculate the area under a curve and im reallly stuck any help would be brillant. i dont really no how to approach it either. even if u could just copy and paste an actual workable solution to the problem i would be very greatful........... cheers...........

How is the curve defined? If you have an equation for it, e.g. y=x^2+3x+5, then you can calculate the area via the integral [Int(y)=x^3/3+3x^2/2+5x].

for example if it was defined for y=x^2 I honestly dont have a clue how to write a basic C++ program for it........ i have to use both rectangles and trapezoids methods to find the area???????????? :undecided:worried:

complex trapezoid method for f(x)=x^2 only ============================= Code: #include <stdio.h> #include <stdlib.h> double f(float); int main(){ float xo,x; float a,b,h; double integral; int n; printf("\ngive left x value;:"); scanf("%f",&a); printf("\ngive right x value;:"); scanf("%f",&b); printf("\nenter how many sections you want(bigger more accurate result):"); scanf("%d",&n); //calculations h=(b-a)/n; integral=(f(a)+f(b))/2; for (int i=1;i<n;i++){ integral+=f(a+i*h); } integral=integral*h; printf("\n the integral of f(x)=x^2,from a=%3f , to b=%3f is %6.3f",a,b,integral); getchar(); getchar(); } double f(float x){ return x*x; }