C语言条件编译 #

#ifdef DEBUG
    printf("调试模式\n");
#endif

#ifndef HEADER_H
#define HEADER_H

#endif

#if VERSION == 1
    #define FEATURE 1
#elif VERSION == 2
    #define FEATURE 2
#else
    #define FEATURE 0
#endif

#if defined(DEBUG) && !defined(RELEASE)
    printf("调试模式\n");
#endif

#ifndef MYHEADER_H
#define MYHEADER_H

int add(int a, int b);

#endif

#ifdef _WIN32
    #define PLATFORM "Windows"
#elif defined(__linux__)
    #define PLATFORM "Linux"
#elif defined(__APPLE__)
    #define PLATFORM "macOS"
#endif

#ifdef DEBUG
    #define LOG(msg) printf("[DEBUG] %s\n", msg)
#else
    #define LOG(msg)
#endif