Modern C for Absolute Beginners: A Friendly Introduction to the C Programming Language

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2024

S. DmitrovićModern C for Absolute Beginnershttps://doi.org/10.1007/979-8-8688-0224-9_41

41. Do Not Overflow a Signed Integer

Slobodan Dmitrović¹  

(1)

Belgrade, Serbia

 

There are lower and upper limits to values a signed integer can hold. An INT_MAX macro represents the maximum signed integer value, and the minimum signed integer value is represented by the INT_MIN macro. These macros are declared inside the <limits.h> header.

Trying to store the value that is higher than the allowable maximum or lower than the allowable minimum causes undefined behavior. Example:

#include <stdio.h>

#include <limits.h>

int main(void)

{

      int x = INT_MAX;

      printf("The maximum ...