//#include "stdafx.h"//If the vc++6.0, with this line.
#include "stdio.h"
int main(void){
int m,n;
double sum;
while(1){
printf("Input m & n(int mscanf("%d%d",&m,&n);
if(mprintf("Error, redo: ");
}
for(sum=0;m<=n;m++)
sum+=1.0/m;
printf("The result is %g\n",sum);
return 0;
}