用c语言计算式子1！+2！+3！+……+n！，并输出结果，用主函数调用子函数的方法实现 c语言：编程实现：输入正整数n，通过函数调用计算1！+2！+...
c\u8bed\u8a00\u8ba1\u7b97\u5f0f\u5b501\uff01+2\uff01+3\uff01+\u2026\u2026+n\uff01\uff0c\u5e76\u8f93\u51fa\u7ed3\u679c\uff0c\u7528\u4e3b\u51fd\u6570\u8c03\u7528\u5b50\u51fd\u6570\u7684\u65b9\u6cd5\u5b9e\u73b0#include
double f(int n) { double r; int i; for ( i=1,r=1;i<=n;i++ ) r*=i; return r; }
void main()
{ int n,i; double s;
scanf("%d",&n); s=0;
for ( i=1;i<=n;i++ ) s+=f(i);
printf("%.0lf\n",s);
}
\u8fd9\u91cc\u56e0\u4e3a\u9636\u4e58\u8ba1\u7b97\u7ed3\u679c\u6bd4\u8f83\u5927\uff0c\u6015\u8d85\u51fa\u6574\u6570\u8303\u56f4\uff0c\u6240\u4ee5\u7528\u4e86double\u578b\u53d8\u91cf\u548c\u51fd\u6570\u8fd4\u56de\u503c\uff0c\u5982\u679c\u4e0d\u62c5\u5fc3\u8fd9\u70b9\u53ef\u4ee5\u66ff\u6362double\u6210int\uff0cprintf\u4e5f\u6362\u6210%d\u8f93\u51fa
#include
int fun1(int n)
{
int sum=1;
for(int i=1;i<=n;i++)
sum*=i;
return sum;
}
int fun(int n)
{
int sum=0;
if(n==1)return 1;
else sum+=fun1(n--);
return sum;
}
void main()
{
int n,sum=0;
cout<<"input n"<<endl;
cin>>n;
for(int i=1;i<=n;i++)
sum+=fun(i);
cout<<sum<<endl;
}
#include <conio.h>
#include <stdlib.h>
int fun(int n);
void main()
{
int i , n = 0, sum = 0;
printf("请输入n的值：");
scanf("%d", &n);
for(i = 1; i <= n; i++)
{
sum = sum + fun(i);
}
printf("sum = %d\n", sum);
system("pause");
}
int fun(int n)
{
if(1 == n)
{
return 1;
}
return n*fun(n-1);
}
就是递归思想的运用。。
#include<stdio.h>
int digui(int n){
if(n==1) return 1;
return n*digui(n-1);
}
int main(){
int i=0,n,tot=0;
scanf("%d",&n);
for(i=1;i<=n;i++) tot+=digui(i);
printf("%d
",tot);
return 0;
}
绛旓細include<stdio.h>void main(){int n;int i;int t;double s = 0;for(n = 1; n <= 5; n++){t = 1;for(i = 1; i <= n; i++ )t = t*i;s = s+t;}printf("%lf\n",s);}
绛旓細鍙傝冧唬鐮佸涓嬶細include<stdio.h>double fac(int n){ if(n<=1) return 1; return fac(n-1)*n;}int main(){ int n; scanf("%d",&n); printf("%.0lf\n",fac(n));//n!}
绛旓細杩欐槸姹俷!include <stdio.h> fac(int n){ if(n < 0)return -1;if(n == 0 || n == 1)return 1;return (n * fac(n-1));} int main(){ int n;printf("please input n:");scanf("%d",&n);int ret = fac(n);printf("%d! = %d\n",n,ret);return 0;} ...
绛旓細int i;for(i=1;i<=5;i++)printf("%d!=%d\n",i, fac(i) ); //杩欎釜寰堝鏄 } intfac(int n){ static int //杩欎釜涓嶅鏄撴兂鍒帮紝闈欐佸彉閲忓彧鍦ㄥ畾涔夋椂璧嬪间竴娆★紝浠ュ悗灏辩敤涓婁竴娆＄殑缁撴灉 f=1;f*=n;return(f);}
绛旓細浠ヤ笅鏄鐢–璇█缂栫▼姹鍑1!+2!+3!+鈥︹+20!鐨勫肩ず渚嬩唬鐮侊細include <stdio.h> int main(){ int i,j;long sum,k;sum=0;for(i=1;i<=20;i++){k=1;for(j=1;j<=i;j++){ k=k*j;} sum=sum+k;} printf("1+2!+3!+鈥+20锛=%d",sum);} ...
绛旓細浣犺c璇█鐨勫惂 涓婇潰閭ｄ綅浠佸厔鐢ㄧ殑c++瀹為檯杩欎釜鐨勫疄鐜板緢绠鍗 锛歩nclude<stdio.h> void main(){ int sum=0;int m=1;for (int i=1;i<=20;i++){ m*=i;sum+=m;} printf("1!+2!+鈥+20!=%d\n",sum);}
绛旓細return r; } void main(){ int n,i; double s;scanf("%d",&n); s=0;for ( i=1;i<=n;i++ ) s+=f(i);printf("%.0lf\n",s);} 杩欓噷鍥犱负闃朵箻璁＄畻缁撴灉姣旇緝澶э紝鎬曡秴鍑烘暣鏁拌寖鍥达紝鎵浠ョ敤浜哾ouble鍨嬪彉閲忓拰鍑芥暟杩斿洖鍊硷紝濡傛灉涓嶆媴蹇冭繖鐐瑰彲浠ユ浛鎹ouble鎴恑nt锛宲rintf涔熸崲鎴%d杈撳嚭 ...
绛旓細int fun(int n);void main(){ int i , n = 0, sum = 0;printf("璇疯緭鍏鐨勫硷細");scanf("%d", &n);for(i = 1; i <= n; i++){ sum = sum + fun(i);} printf("sum = %d\n", sum);system("pause");} int fun(int n){ if(1 == n){ return 1;} return n*...
绛旓細include<stdio.h>int main(){ int i,sum=1; int fact(int n); for(i=1;i<5;i++) { sum=sum*fact(i); } printf("1!*2!*3!*4!=%d\n",sum); return 0; } int fact(int n) { if(n==1||n==0) return 1; else return n*fact(n-1);} ...
绛旓細include <stdio.h>int func(int n){ int i; int result=0, fac =1; for(i = 1; i <= n; i ++) { fac*=i; result += fac; } return result;}int main(){ int n; scanf("%d",&n); printf("%d\n",func(n)); return 0;}濡傛灉闇瑕佹敮鎸佸ぇ鏁 鍙互 include <stdio.h>...
