分别用while语句、do-while语句编写程序，计算e≈1+1/1!+1/2!+...+1/n!。

#include #include #define ESP 10e-5 /*方差*/ int Factorial(int n) /*求n的阶乘*/ { if(n ESP) { sum = sum + fac; pre_fac = fac; n++; fac = 1.0/Factorial(n); } printf("\nn = %d sum = %f\n", n, sum); /*do