遞迴定義1X2+2X3+........+NX(N-1)之2
#include<stdio.h>
#include<stdlib.h>
int rsum(int n)
{
if(n!=1)
return rsum(n-1)+n*(n-1);
else
return 0;
}
int main(void)
{
int a;
printf("Given a number:\n");
scanf("%d",&a);
printf("We get the result:\n");
printf("%d\n",rsum(a));
system("pause");
return 0;
}
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Sealed (Aug 24)
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