1+1/2+1/3+.+1/100求和，并上机运行程序，

#include
int main( )
{ int i=；

    float sum=;
   while()

{
;
}
printf("sum=%f\n",sum);
return 0;
}

#include<stdio.h>
 int main( )
{ int i=1;

    float sum=0;
   while(i<=100)
{
 sum=sum+1.0/i;
 i++;
}
printf("sum=%f\n",sum);
return 0;
}

#include <stdio.h>
int main()
{
    double sum = 0.0;
    for (int i = 1; i<= 100; i++)
    {
        sum += 1.0 / (double)i;
    }
    printf("sum = %lf\n", sum);
    return 0;
}