关于scanf 和gets（）的问题？请问以下两者有什么区别 c语言中gets函数和是scanf函数有什么区别呢？？

gets()\u548cscanf()\u5173\u4e8e\u7a7a\u683c\u7684\u5904\u7406\u5230\u5e95\u6709\u4ec0\u4e48\u533a\u522b\u5462

gets()\u53ea\u80fd\u63a5\u53d7\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5176\u7528\u6cd5\u4e3agets(string),\u5f53\u4f60\u8f93\u5165\u4e00\u6bb5\u5b57\u7b26\u65f6\uff0c\u5176\u4e2d\u7684\u7a7a\u683c\u5f53\u505a\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\uff1bscanf\u51fd\u6570\u4e2d\u7a7a\u683c\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u4f8b\u5982scanf("%d%d:,&a,&b),\u5f53\u4f60\u8f93\u51653 \uff08\u7a7a\u683c\uff09 4 \u65f6\uff0c\u9047\u5230\u7a7a\u683c\u8868\u793a\u7b2c\u4e00\u4e2a\u6570\u5df2\u7ecf\u8f93\u5165\u5b8c\u6bd5\uff0c\u5373\u628a3\u4ed8\u7ed9a,\u7136\u540e\u5c06\u63a5\u53d7\u5230\u7684\u7b2c\u4e8c\u4e2a\u6570\u4ed8\u7ed9b\uff0c\u540c\u65f6\u8981\u6ce8\u610f\uff0c\u5982\u679c\u7528scanf("%C%C%C",&ch1,&ch2,&ch3)\u662f\u5e94\u8fde\u7eed\u8f93\u5165\u4e09\u4e2a\u5b57\u7b26,\u4f8b\u5982dfg,\u5982\u679c\u6b64\u65f6\u518d\u7528\u7a7a\u683c\uff0c\u4f8b\u5982\u8f93\u5165d \u7a7a\u683c f \u7a7a\u683c g,\u5b9e\u9645\u662f\u5c06d\u4ed8\u7ed9\u5b57\u7b26\u53d8\u91cfch1,\u5c06\u7a7a\u683c\u4ed8\u7ed9ch2,g\u8d4b\u7ed9ch3;\u5f53\u7528scanf("%s",str)\u8f93\u5165\u5b57\u7b26\u4e32\u662f\u4e8c\u8005\u57fa\u672c\u4e0a\u6ca1\u6709\u533a\u522b

\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

char * gets ( char * str );
Get string from stdin
Reads characters from stdin and stores them as a string into str until a newline character ('\n') or the End-of-File is reached.
The ending newline character ('\n') is not included in the string.
所以gets()是碰到回车，认为输入结束。而且，gets()不接收回车符。
第一个程序，str[100]是空的，因为碰到回车，所以直接结束输入。
int getchar ( void );
Get character from stdin
Returns the next character from the standard input (stdin).
It is equivalent to getc with stdin as its argument.
通常用getchar()来接收回车符，getchar()是接收一个字符，当输入回车了，回显字符。
第二个程序，回车符被getchar()吸收了，所以后面的内容能够传递给str[100].

扩展阅读：scanf gets getchar ... 中英文自动翻译器 ... 英转中翻译器 ... scanf与gets连用 ... gets 和scanf s 的区别 ... gets和scanf一起用 ... c语言scanf用法举例 ... c语言中gets和scanf ... c语言scanf后面接gets ...