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±ê×¼C¿ØÖÆÌ¨ÊäÈëÊä³öÁ÷º¯ÊýÍ·Îļþ<cstdio>-----<stdio.h>
using ::size_t; using ::fpos_t; using ::FILE;
using ::clearerr; using ::fclose; using ::feof;
using ::ferror; using ::fflush; using ::fgetc;
using ::fgetpos; using ::fgets; using ::fopen;
using ::fprintf; using ::fputc; using ::fputs;
using ::fread; using ::freopen; using ::fscanf;
using ::fseek; using ::fsetpos; using ::ftell;
using ::fwrite; using ::getc; using ::getchar;
using ::gets; using ::perror;
using ::putc; using ::putchar;
using ::printf; using ::puts; using ::remove;
using ::rename; using ::rewind; using ::scanf;
using ::setbuf; using ::setvbuf; using ::sprintf;
using ::sscanf; using ::tmpfile; using ::tmpnam;
using ::ungetc; using ::vfprintf; using ::vprintf;
using ::vsprintf;
wsprintf() //winuser.h,include in windows.h
size_tÒ»°ãÓÃÀ´±íʾһÖÖ¼ÆÊý£¬±ÈÈçÓжàÉÙ¶«Î÷±»¿½±´µÈ£¬sizeof²Ù×÷·ûµÄ½á¹ûÀàÐÍÊÇsize_t£¬ËüÔÚÍ·ÎļþÖÐtypedefΪ unsigned intÀàÐÍ£¬¼´typedef unsigned int size_t £¬¸ÃÀàÐͱ£Ö¤ÄÜÈÝÄÉʵÏÖËù½¨Á¢µÄ×î´ó¶ÔÏóµÄ×Ö½Ú´óС¡£strncat£¬strncmp£¬strncpyµÈ¶¼Óõ½ÁËËü¡£
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