/******************************************************************************
 
Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C/C++.
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*******************************************************************************/
#include <stdio.h>
long l = 5;
long* foo()
{
    return &l; //return l's memory adress;
}
 
int main()
{
   *(foo())=5;
    printf("l= %ld\n",l); 
 
 
 
    return 0;
}

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