help with calculating the area

[iOsama]

i have to write a c++ program to estimate the area under the curve y=x^2 from x1=1 to x2=10 and i have to use Riemann sum to compute the area for
n=10
n=100
n=1000

[Ganado]

Do you know how to do this with paper and pencil? That would be the first step. Try something and post your code when you get stuck.