how to get the smallest possible integer in C++ code example

Example 1: how to set an integer equal to the largest integer possible in c++

// largest int in c++
signed int iMax = (unsigned int)~0 >> 1;
// largest unsigned int
unsigned int uMax = (unsigned int)~0;

Example 2: int max in c++

2147483647
  unsigned long long int = 18 446 744 073 709 551 615