Simple C file explaining the execution of the 'ret' x86/x64 instruction

exampleRET.c

#include <stdio.h>
 
int main()
{
  // call function and save the address
  // pointing to the 'int varint = 0' line
  // on the stack
  printf("Hello world\n");
  
  // once 'printf' is finished, pop
  // the saved address off the stack
  // to continue execution here
  int varint = 0;
  return 0;
}