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Create Efficient way to multiply with 7 #2

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21 changes: 21 additions & 0 deletions Efficient way to multiply with 7
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Original file line number Diff line number Diff line change
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# include<bits/stdc++.h>

using namespace std;
//c++ implementation
long multiplyBySeven(long n)
{
/* Note the inner bracket here. This is needed
because precedence of '-' operator is higher
than '<<' */
return ((n<<3) - n);
}

/* Driver program to test above function */
int main()
{
long n = 4;

cout<<multiplyBySeven(n);

return 0;
}