89.根据公式计算值

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
double fun(int m)
{
double t = 1.0;
int i;
for (i= 2;i <= m;i++)
t = t - 1.0 / i;
return t;
}
int main()
{
int m;
printf("\nPlease enter 1 integer number:\n");
scanf("%d", &m);
printf("\n\nThe result is %lf\n", fun(m));
system("pause");
return 0;
}