锛堝満鏅?锛夊綋浣犲惌鍝у惌鍝у啓浜嗕笁涓墦鍗板嚱鏁帮細print_int()銆乸rint_float()銆乸rint_string()锛岀獊鐒跺彂鐜拌繕瑕佸鐞嗙粨鏋勪綋鏁版嵁...杩欒皝椤跺緱浣忓晩锛熷挶浠粖澶╁氨鐢ㄥ満鏅寲鎬濈淮锛屾妸閲嶅浠ｇ爜鎻夌浜嗛噸缁勩€?/p>

鈥?strong>鈥嬬湡瀹炲紑鍙戝洶澧冨疄褰曪細鈥?/strong>鈥?/p>

1. 鐢ㄦ埛绠＄悊绯荤粺瑕佸鐞唅nt鍨嬪勾榫勩€乫loat鍨嬭柂璧勩€乧har*濮撳悕
2. 鐗╄仈缃戣澶囬渶瑕侀€傞厤涓嶅悓浼犳劅鍣ㄦ暟鎹牸寮?/li>
3. 璺ㄥ钩鍙板紑鍙戞椂鏁版嵁浜ゆ崲鐨勫瓧鑺傚簭杞崲

鍦烘櫙涓€锛氫竾鑳芥墦鍗板嚱鏁?/h3>

锛堟帍鍑洪敭鐩樼幇鍦烘敼BUG锛夊亣璁句綘姝ｅ湪璋冭瘯鐢ㄦ埛妗ｆ妯″潡锛?/p>

c澶嶅埗
//鍘熷浠ｇ爜
void debug_int(int x) { printf("鍊?%d\n",x); }
void debug_float(float x) { printf("鍊?%f\n",x); }

鈥?strong>鈥嬫敼閫犳楠わ細鈥?/strong>鈥?/p>

1. 鐢╲oid*鎿﹂櫎绫诲瀷鐗瑰緛

c澶嶅埗
void debug_generic(void* data, char type) {
    if(type == 'i') printf("INT:%d\n",*(int*)data);
    else if(type == 'f') printf("FLOAT:%f\n",*(float*)data);
}

1. 鍔犱釜绫诲瀷鏍囪瘑鍙傛暟锛?i'浠ｈ〃int锛?f'浠ｈ〃float锛?/li>
2. 璋冪敤鏃跺己鍒惰浆鎹細

c澶嶅埗
int age = 25;
debug_generic(&age, 'i');

鈥?strong>鈥嬩絾杩欐牱鏈変釜鑷村懡浼も€斺€斿鏄撲紶閿欑被鍨嬫爣璇嗭紒鈥?/strong>鈥?杩欐椂鍊欏畯瀹氫箟灏辫鍑哄満浜嗭細

鍦烘櫙浜岋細鑷姩绫诲瀷缁戝畾

锛堣€佹澘绐佺劧瑕佸姞涓猯ong绫诲瀷鏀寔锛?/p>

c澶嶅埗
#define DEBUG(T) \
void debug_##T(T value) { \
    printf("%s : ",#T); \
    _Generic((value), \
        int: printf("%d\n",value), \
        float: printf("%f\n",value) \
    ); \
}

DEBUG(int)  //鐢熸垚debug_int鍑芥暟
DEBUG(float) //鐢熸垚debug_float鍑芥暟

鐜板湪璋冪敤鏃跺交搴曚笉鐢ㄧ绫诲瀷锛?/p>

c澶嶅埗
debug_int(age); //鑷姩璇嗗埆绫诲瀷

鈥?strong>鈥嬬獊鐒跺彂鐜癈11鐨刜Generic钘忓湪瀹忛噷鏇村ソ鐢紒鈥?/strong>鈥?涓嶈繃瑕佸皬蹇冭€佹棫缂栬瘧鍣ㄥ彲鑳戒笉璁よ繖涓娉曘€?/p>

鍦烘櫙涓夛細璺ㄥ钩鍙版暟鎹墦鍖?/h3>

锛堢墿鑱旂綉璁惧瑕佷紶杈撴俯搴︿紶鎰熷櫒鐨刬nt鏁版嵁鍜屾箍搴︿紶鎰熷櫒鐨刦loat鏁版嵁锛?/p>

涓婄‖鏍告搷浣滐細

c澶嶅埗
typedef struct {
    void* data;
    size_t type_size;
    char type_code;
} GenericPacket;

void send_packet(GenericPacket p) {
    char buffer[256];
    memcpy(buffer, p.data, p.type_size);
    //杩欓噷娣诲姞缃戠粶浼犺緭浠ｇ爜...
}

//浣跨敤绀轰緥
float humidity = 68.5;
GenericPacket p = {&humidity, sizeof(float), 'H'};
send_packet(p);

鈥?strong>鈥嬫敞鎰忚繖涓柟妗堝儚璧伴挗涓濓細鈥?/strong>鈥?/p>

• 鉁?鍐呭瓨浣跨敤鐜囪秴楂?/li>
• 鉂?瀹屽叏渚濊禆绋嬪簭鍛樿嚜寰?/li>
• 馃挜 绫诲瀷鐮?H'蹇呴』鍏ㄥ眬缁熶竴

锛堢伒榄傛嫹闂級杩欎箞楹荤儲涓轰粈涔堜笉鎹㈣瑷€锛熼棶灏辨槸宓屽叆寮忓紑鍙戞病寰楅€夛紒鑰侀」鐩殑绁栦紶浠ｇ爜灏卞儚绌夸簡涓夊勾鐨勮瀛愶紝鐮翠篃寰楁帴鐫€琛ャ€?/p>

鏈€鍚庤鐐逛汉璇濓細瀹為檯椤圭洰涓缓璁妸瀹忓拰void*缁勫悎浣跨敤銆傛瘮濡傜敤瀹忕敓鎴愮被鍨嬪０鏄庯紝瀹為檯鎿嶄綔浜ょ粰娉涘瀷鍑芥暟銆傝櫧鐒剁湅鐫€鍍忕敤鎵笟鍒掕埞锛屼絾鍦ㄨ祫婧愬彈闄愮殑鐜閲岋紝杩欏彲姣旂湡娉涘瀷鐪佸唴瀛樺浜嗐€傝浣忥紝鍦–璇█閲岀帺娉涘瀷锛屾渶閲嶈鐨勪笉鏄紭闆咃紝鑰屾槸娲荤潃鎶婁唬鐮佽窇璧锋潵锛?/p>