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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Mar 19, 2001



Application Security Testing: An Integral Part of DevOps

Do Not Use Global Variables With Recursion

Global variables should never be used with recursion. It leads to stack overflow and program crash. Recursion works well only if it is in a self contained unit, using local variables.

Take this sample code segment:
int globalvariable;
if(++globalvariable==100)//take any value
return 0;
somefunction(); //the function changes value of
//global variable

If somefunction(),globalvariable is altered, the program goes into an infinite sequence of function calls--each one of which can lead to stack overflow.
Shiv Kumar
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