Question

用C语言解决：求1-1/2+1/3-…+1/99-1/100.

如题。考虑精确度。

Answer 1

#include <cstdlib> #include <iostream> #include <iomanip> using namespace std; int main() { double result = 0; for (int i = 0; i < 50; i++) { result += 1.0 / double(2 * i + 1); result -= 1.0 / double(2 * i + 2); } cout << setprecision(15) << result << endl; system("pause"); return 0; }