習(xí)慣性的用了for循環(huán)來自定義函數(shù)
習(xí)慣性的用了for循環(huán)來自定義函數(shù)。
沒能實現(xiàn)調(diào)用自身，也就是沒完成遞歸……
#include<stdio.h>
//自定義求和函數(shù)
int?sum(int?n)
{
????int?i=0,result=0;
????for(i=1;i<=n;i++)
????{
????????result?+=i;
????}
????return?result;
}
int?main()
{
????int?n=10;
????printf("到第%d天，小明總共記了%d個單詞。\n",n,sum(n));
????return?0;
}
2015-07-06
int?sum(int?n){ ????int?result; ????if(n==1)? ????????result=1; ????else? ????????result=sum(n-1)+n; ????return?result; }