res
is the name of a local variable in the function avge
that is returned at then end of that function.
// Variable of type float with name "res" is declared
float res;
// Compute some value and assign it to this variable
res = (a+b+c)/3.0;
// Return the variable to the caller
return res;
“res” usually is an abbreviation for “result”.
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solved What is the meaning of “res” in C++?