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从主函数中输入一个正整数n,并通过调用fac()函数...

fac函数里面 i的初始值为1 while(i

#includedouble f(int n);int main(void){int n;printf("Enter n:");scanf("%d",&n);printf("%lf\n",f(n));return 0;}double f(int n){if(n==0||n==1)return 1;elsereturn n*f(n-1);}

#include int fun1(int n) { int sum=1; for(int i=1;i

#include "stdio.h" /*这是求解函数,返回一个数的阶乘*/long fac(long i){ if(i < 2) return 1; else return i*fac(i-1);} void main(){ long num; scanf("%ld",&num); /*由用户控制输入*/ printf("fac(%ld):%ld\n",num,fac(num));}

受计算机数据精度的限制,只能计算到17的阶乘 Dim n As Integer For n = 1 To 17 Print n; ":", Print fac1(n), Print fac2(n) Next n End Sub Function fac1(n As Integer) As Double Dim x As Double x = 1 For i = 2 To n x = x * i Next i fa...

#include #define _M 10 #define _N 5 typedef struct mn{ __int64 fac_M; __int64 fac_N; __int64 M; __int64 N; }mplusn; __int64 func(mplusn M_N) { if(M_N.M == 0 && M_N.N == 0) return M_N.fac_M + M_N.fac_N; else if(M_N.M != 0) { M_N...

int fac(int a){ int sum = 1; while(a) sum *= a--; return sum; } int tep(int num){ if(num999) return -1; int i; if(fac(num%10)+fac((num/10)%10)+fac(num/100) == num) return 1; else return 0; }

//用递归函数处理 #include #include #include long int fac(int n) { long int sum=0; if(n==1) sum=1; else sum=n*fac(n-1); return sum; } void main() { long int c=0; int n,m; printf("please input n="); scanf("%d",&n); printf("please...

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