Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I copied an example project from here, but I don’t understand part of it: (i - 0.5). Why is (i - 0.5) being computed?
double rectangle_integrate(double a, double b, int subintervals, double (*function)(double))
{
double result;
double interval;
int i;
interval=(b-a)/subintervals;
result=0;
for(i=1;i<=subintervals;i++){
result+=function(a+interval*(i-0.5));
}
result*=interval;
return result;
}
It represents the middle of the interval. When i is 1 the interval is 0 to 1, and 0.5 is the middle of it. Etc.