#include  
Void main () 
{
Int I, n, jiecheng=1; 
Double s=0.0; 
Printf (" please input the value of n "); 
The scanf (" % d ", & amp; N); 
for(i=1; i<=n; I++) 
{
Jiecheng=jiecheng * I; 
S=s + (1.0/jiecheng); 
} 
Printf (" results for % lf ", s); 
} 

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