πの求め方 積分(台形則) #import <Foundation/Foundation.h> #import <math.h> double f(double x) { return 4 / (1 + x * x); } int main() { const double a = 0; const double b = 1; // 台形則で積分 int n = 2; int i, j; for (j = 1; j <= 10; j++) { double h = (b - a) / n; double s </math.h></foundation/foundation.h>…