<cinttypes>
Includes the Standard C library header <inttypes.h>. Including this header also includes <cstdint>.
Syntax
#include <cinttypes>
Remarks
Including this header ensures that the names declared by using external linkage in the Standard C library header are declared in the std
namespace.
See also
<cstdint>
Header Files Reference
C++ Standard Library Overview
Thread Safety in the C++ Standard Library