光输出,注意格式
#include <iostream> #include <cstdio> #include <cstring> using namespace std; int main() { // freopen("C:\Users\super\Documents\CB_codes\in.txt", "r", stdin); //freopen("C:\Users\super\Documents\CB_codes\out.txt","w",stdout); printf("n e "); printf("- ----------- "); double e = 0; int f[10]; f[0] = 1; for(int i = 1; i < 10; i ++ ) { f[i] = f[i-1] * i; // printf("%d ",f[i]); } for(int i = 0; i < 10; i ++ ) { e += (1.0 / f[i]); if(i > 2) printf("%d %.9lf ",i,e); else printf("%d %lg ",i,e); } fclose(stdin); return 0; }