// Determine the larger value of two parameters
void Larger(int,int&,int);

int iVal1 = 70;
int iVal2 = 117;
int iVal3;

store the larger of iVal1 and iVal2 into iVal3




Larger(iVal1,iVal3,iVal2);
or 
Larger(iVal2,iVal3,iVal1);

param 2 is the only param that is not pass by value
so the only way the function could pass data back to the caller
would be via param 2




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