c++ - Trying to make a simple recursion exercise -

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hi im trying create function : double harmonicsum(int n) calculates , returns sum 1 + ½ + 1/3 + ... + 1/n

this code 

double harmonicsum(int n) {   if(n==1) return 1;   return (1.0/n) + (1.0/(harmonicsum(n-1))); }

it doesnt work . if call harmonicsum(1) or harmonicsum(2) works , harmonicsum(3) no .

correct code 

double harmonicsum(int n){ if(n==1) return 1; return (1.0/n) + harmonicsum(n-1);

}

simply try below double hermonic(int n) {     if(n==1)         return 1 ;     else         return ( float )  1/n + hermonic(n - 1) ; }

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