πの求め方 積分(台形則) import std.stdio; import std.math; void main(string[] args) { const double a = 0; const double b = 1; // 台形則で積分 int n = 2; for (int j = 1; j <= 10; j++) { double h = (b - a) / n; double s = 0; double x = a; for…