c语言里面,有了GETS函数,为什么还要SCANF呢
c\u8bed\u8a00\u4e2dgets\u51fd\u6570\u548c\u662fscanf\u51fd\u6570\u6709\u4ec0\u4e48\u533a\u522b\u5462\uff1f\uff1f\u4e00\u3001\u6307\u4ee3\u4e0d\u540c
1\u3001scanf\uff1a\u662fC\u8bed\u8a00\u4e2d\u7684\u4e00\u4e2a\u8f93\u5165\u51fd\u6570\u3002
2\u3001gets\uff1a\u4ece\u6807\u51c6\u8f93\u5165\u8bbe\u5907\u8bfb\u5b57\u7b26\u4e32\u51fd\u6570\u3002
\u4e8c\u3001\u8bfb\u53d6\u65b9\u5f0f\u4e0d\u540c
1\u3001scanf\uff1a\u662f\u683c\u5f0f\u8f93\u5165\u51fd\u6570\uff0c\u5373\u6309\u7528\u6237\u6307\u5b9a\u7684\u683c\u5f0f\u4ece\u952e\u76d8\u4e0a\u628a\u6570\u636e\u8f93\u5165\u5230\u6307\u5b9a\u7684\u53d8\u91cf\u4e4b\u4e2d\u3002
2\u3001gets\uff1a\u53ef\u4ee5\u65e0\u9650\u8bfb\u53d6\uff0c\u4e0d\u4f1a\u5224\u65ad\u4e0a\u9650\uff0c\u4ee5\u56de\u8f66\u7ed3\u675f\u8bfb\u53d6\uff0c\u6240\u4ee5\u7a0b\u5e8f\u5458\u5e94\u8be5\u786e\u4fddbuffer\u7684\u7a7a\u95f4\u8db3\u591f\u5927\uff0c\u4ee5\u4fbf\u5728\u6267\u884c\u8bfb\u64cd\u4f5c\u65f6\u4e0d\u53d1\u751f\u6ea2\u51fa\u3002
\u4e09\u3001\u6570\u636e\u6d41\u5411\u4e0d\u540c
1\u3001scanf\uff1a\u51fd\u6570 scanf() \u662f\u4ece\u6807\u51c6\u8f93\u5165\u6d41stdin (\u6807\u51c6\u8f93\u5165\u8bbe\u5907\uff0c\u6307\u5411\u952e\u76d8)\u4e2d\u8bfb\u5185\u5bb9\u7684\u901a\u7528\u5b50\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u8bf4\u660e\u7684\u683c\u5f0f\u8bfb\u5165\u591a\u4e2a\u5b57\u7b26\uff0c\u5e76\u4fdd\u5b58\u5728\u5bf9\u5e94\u5730\u5740\u7684\u53d8\u91cf\u4e2d\u3002
2\u3001gets\uff1a\u4ecestdin\u6d41\u4e2d\u8bfb\u53d6\u5b57\u7b26\u4e32\uff0c\u76f4\u81f3\u63a5\u53d7\u5230\u6362\u884c\u7b26\u6216EOF\u65f6\u505c\u6b62\uff0c\u5e76\u5c06\u8bfb\u53d6\u7684\u7ed3\u679c\u5b58\u653e\u5728buffer\u6307\u9488\u6240\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u4e2d\u3002\u6362\u884c\u7b26\u4e0d\u4f5c\u4e3a\u8bfb\u53d6\u4e32\u7684\u5185\u5bb9\uff0c\u8bfb\u53d6\u7684\u6362\u884c\u7b26\u88ab\u8f6c\u6362\u4e3a\u2018\0\u2019\u7a7a\u5b57\u7b26\uff0c\u5e76\u7531\u6b64\u6765\u7ed3\u675f\u5b57\u7b26\u4e32\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-gets
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-scanf
typedef struct tagStuList
{
STUDENT student[MAX_SIZE];
int length;
}STULIST;
\u53ea\u662f\u5f62\uff0c\u8981\u58f0\u660e\u5b9e\u4f53\uff0c\u4f8b\u5982\uff1aSTULIST struStulist;
\u8c03\u7528\u5c31\u8fd9\u6837\uff1astruStulist.length=0;\u5176\u4ed6\u7684\u7c7b\u4f3c\u3002
scanf以空格或回车作为结束标记；
gets函数并不以空格作为字符串输入结束的标志， 而只以回车作为输入结束。这是与scanf函数不同的。
绛旓細c璇█閲実ets(a) 琛ㄧず杈撳叆涓涓瓧绗︿覆鍒版暟缁刟锛宎琛ㄧず璇诲彇涓涓瓧绗︿覆瀛樺叆a涓,瀛楃涓茶緭鍏ョ粨鏉熸爣蹇椾负鎹㈣绗︺傛瘮濡 杈撳叆321 cs dd鍥炶溅 a涓瓨鍌ㄤ负 321 cs dd
绛旓細涓銆侀棶棰樻弿杩帮細浠庨敭鐩樿緭鍏ヤ竴涓瓧绗︿覆缁檚tr鍜屼竴涓瓧绗︾粰c锛鍒犻櫎str涓殑鎵鏈夊瓧绗骞惰緭鍑哄垹闄ゅ悗鐨勫瓧绗︿覆str銆1銆佽緭鍏ワ細绗竴琛屾槸涓涓瓧绗︿覆锛 绗簩琛屾槸涓涓瓧绗︺2銆佽緭鍑猴細鍒犻櫎鎸囧畾瀛楃鍚庣殑瀛楃涓层備簩銆佽璁℃濊矾锛1銆 鍚屾彃鍏ラ棶棰橈紝瀹氫箟涓や釜瀛楃鏁扮粍a锛宐銆備互鍙婃爣蹇楀垹闄や綅缃殑int鍨媝os銆2銆佺敤gets鍑芥暟...
绛旓細c璇█锛実ets()鍑芥暟鐢ㄦ潵浠庢爣鍑嗚緭鍏ヨ澶囷紙閿洏锛璇诲彇瀛楃涓鐩村埌鎹㈣绗︾粨鏉燂紝浣嗘崲琛岀浼氳涓㈠純锛岀劧鍚庡湪鏈熬娣诲姞'\0'瀛楃銆傚叾璋冪敤鏍煎紡涓猴細gets(s)銆傚叾涓璼涓哄瓧绗︿覆鍙橀噺锛堝瓧绗︿覆鏁扮粍鍚嶆垨瀛楃涓叉寚閽堬級銆傚鏋滀负鍗曚釜瀛楃鎸囬拡锛岀紪璇戣繛鎺ヤ笉浼氭湁閿欒锛屼絾杩愯鍚庡唴瀛樻孩鍑洪敊璇
绛旓細C璇█鐨勫瓧绗︿覆杈撳叆鍑芥暟gets()鍙婂叾缂洪櫡 鍦C璇█涓紝瀛楃涓茶瀹氫箟涓哄瓧绗﹀簭鍒楋紝閫氬父瀛樺偍鍦╟har绫诲瀷鐨勬暟缁勪腑銆傚敖绠℃病鏈変笓鐢ㄧ殑瀛楃涓茬被鍨嬶紝浣嗗瓧绗︿覆甯搁噺濡"x"涓庡瓧绗﹀父閲'x'鏈夋湰璐ㄥ尯鍒紝鍓嶈呮槸瀛楃鏁扮粍锛屽悗鑰呮槸鍩烘湰绫诲瀷銆傝幏鍙栧瓧绗︿覆鏃讹紝scanf()閰嶅悎%s鏈夊眬闄愶紝閬囧埌绌烘牸灏卞仠姝紝鑰実ets()鍑芥暟鍒欑敤浜庤鍙栦竴琛岀洿鑷...
绛旓細渚嬪涓嬮潰鐨勪唬鐮侊細```char str[100];gets(str);```杩欎細灏嗚緭鍏ョ殑涓鏁磋瀛楃璇诲彇鍒 str 鏁扮粍涓銆傚洜姝锛実ets() 鍑芥暟鍙互璇诲彇澶氫釜瀛楃锛岃屼笉鏄粎闄愪簬涓涓瓧绗︺傞渶瑕佹敞鎰忕殑鏄紝鐢变簬 gets() 鍑芥暟娌℃湁鎻愪緵杈撳叆闀垮害涓婇檺妫鏌ワ紝鍥犳瀹规槗寮曞彂缂撳啿鍖烘孩鍑虹瓑瀹夊叏闂锛屽洜姝ゆ渶濂戒娇鐢ㄦ洿瀹夊叏鐨勫嚱鏁帮紝渚嬪 fgets() ...
绛旓細gets鍙兘杈撳叆涓涓瓧绗︿覆,涔熸槸灏卞瓧绗︽暟缁,鑰宻canf鍙互鎺ュ彈涓涓瓧绗︿覆鍜屽崟涓瓧绗,姣攇ets鏇村己澶
绛旓細C璇█涓璯ets鍑芥暟涓巊etchar鍑芥暟鐨勫尯鍒 涓銆佸嚱鏁拌緭鍏ユ柟闈 1銆乬ets()鍑芥暟鐢ㄦ潵浠庢爣鍑嗚緭鍏ヨ澶(閿洏)璇诲彇瀛楃涓茬洿鍒板洖杞︾粨鏉燂紝浣嗗洖杞︾涓嶅睘浜庤繖涓瓧绗︿覆銆傚叾璋冪敤鏍煎紡涓猴細gets(s)锛泂涓哄瓧绗︿覆鍙橀噺(瀛楃涓叉暟缁勫悕鎴栧瓧绗︿覆鎸囬拡锛夛紝gets(s)鍑芥暟涓巗canf("%s", &s)鐩镐技锛屼絾涓嶅畬鍏ㄧ浉鍚屻2銆佽実etchar鍑芥暟杩愯鏃...
绛旓細c璇█锛実ets()鍑芥暟鐢ㄦ潵浠庢爣鍑嗚緭鍏ヨ澶囷紙閿洏锛璇诲彇瀛楃涓鐩村埌鎹㈣绗︾粨鏉燂紝浣嗘崲琛岀浼氳涓㈠純锛岀劧鍚庡湪鏈熬娣诲姞'\0'瀛楃銆傚叾璋冪敤鏍煎紡涓猴細gets(s)銆傚叾涓璼涓哄瓧绗︿覆鍙橀噺锛堝瓧绗︿覆鏁扮粍鍚嶆垨瀛楃涓叉寚閽堬級銆傚鏋滀负鍗曚釜瀛楃鎸囬拡锛岀紪璇戣繛鎺ヤ笉浼氭湁閿欒锛屼絾杩愯鍚庡唴瀛樻孩鍑洪敊璇
绛旓細1銆gets() 鍑芥暟鏄粠閿洏杈撳叆瀛楃涓诧紝璇ュ嚱鏁板彧鏈変竴涓弬鏁般傚弬鏁扮被鍨嬩负 char* 鍨嬶紝鍗 str 鍙互鏄竴涓瓧绗︽寚閽堝彉閲忓悕锛屼篃鍙互鏄竴涓瓧绗︽暟缁勫悕銆傛墦寮缂栬緫鍣紝鏂板缓涓涓c璇█鏂囦欢锛屽紩鍏ユ爣鍑嗗簱骞舵柊寤轰富鍑芥暟锛2銆乬ets() 鍑芥暟鐨鍔熻兘鏄粠杈撳叆缂撳啿鍖涓璇诲彇涓涓瓧绗︿覆瀛樺偍鍒板瓧绗︽寚閽堝彉閲 str 鎵鎸囧悜鐨勫唴瀛樼┖闂...
绛旓細涓銆佹寚浠ｄ笉鍚 1銆乻canf锛氭槸C璇█涓殑涓涓緭鍏ュ嚱鏁般2銆gets锛氫粠鏍囧噯杈撳叆璁惧璇诲瓧绗︿覆鍑芥暟銆備簩銆佽鍙栨柟寮忎笉鍚 1銆乻canf锛氭槸鏍煎紡杈撳叆鍑芥暟锛鍗虫寜鐢ㄦ埛鎸囧畾鐨勬牸寮忎粠閿洏涓婃妸鏁版嵁杈撳叆鍒版寚瀹氱殑鍙橀噺涔嬩腑銆2銆乬ets锛氬彲浠ユ棤闄愯鍙栵紝涓嶄細鍒ゆ柇涓婇檺锛屼互鍥炶溅缁撴潫璇诲彇锛屾墍浠ョ▼搴忓憳搴旇纭繚buffer鐨勭┖闂磋冻澶熷ぇ锛屼互渚垮湪...
