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C Öдó¶àÊý»º³åÇøÒç³öÎÊÌâ¿ÉÒÔÖ±½Ó×·Ëݵ½±ê×¼ C ¿â¡£×îÓꦵÄ×ï¿ý»öÊ×ÊDz»½øÐÐ×Ô±äÁ¿¼ì²éµÄ¡¢ÓÐÎÊÌâµÄ×Ö·û´®²Ù×÷£¨strcpy¡¢strcat¡¢sprintf ºÍ gets£©¡£±ÜÃâʹÓà strcpy()ºÍÓÀÔ¶²»Ê¹Óà gets().
C ±à³ÌÖеÄÎÊÌ⺯Êý:
1.strcpy()
strcpy()º¯Êý½«Ô´×Ö·û´®¸´ÖƵ½»º³åÇø¡£Ã»ÓÐÖ¸¶¨Òª¸´ÖÆ×Ö·ûµÄ¾ßÌåÊýÄ¿¡£¸´ÖÆ×Ö·ûµÄÊýĿֱ½ÓÈ¡¾öÓÚÔ´×Ö·û´®ÖеÄÊýÄ¿¡£Èç¹ûÔ´×Ö·û´®ÅöÇÉÀ´×ÔÓû§ÊäÈ룬ÇÒûÓÐרÃÅÏÞÖÆÆä´óС£¬ÔòÓпÉÄÜ»áÏÝÈë´óµÄÂé·³ÖУ¡

2.strcat()
strcat()º¯Êý·Ç³£ÀàËÆÓÚ strcpy()£¬³ýÁËËü¿ÉÒÔ½«Ò»¸ö×Ö·û´®ºÏ²¢µ½»º³åÇøÄ©Î²¡£ËüÒ²ÓÐÒ»¸öÀàËÆµÄ¡¢¸ü°²È«µÄÌæ´ú·½·¨ strncat()¡£Èç¹û¿ÉÄÜ£¬Ê¹Óà strncat() ¶ø²»ÒªÊ¹Óà strcat()¡£

3.sprintf()
4.vsprintf
º¯Êý sprintf()ºÍ vsprintf()ÊÇÓÃÀ´¸ñʽ»¯Îı¾ºÍ½«Æä´æÈ뻺³åÇøµÄͨÓú¯Êý¡£ËüÃÇ¿ÉÒÔÓÃÖ±½ÓµÄ·½Ê½Ä£·Â strcpy() ÐÐΪ¡£»»¾ä»°Ëµ£¬Ê¹Óà sprintf() ºÍ vsprintf() ÓëʹÓà strcpy() Ò»Ñù£¬¶¼ºÜÈÝÒ×¶Ô³ÌÐòÔì³É»º³åÇøÒç³ö¡£

5.scanf()
sscanf()
fscanf()
vfscanf()
vscanf()
vsscanf()

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_content>void main(int argc, char **argv)
  {
  char buf[256];
  sscanf(argv[0], "%s", &buf);
  }


_content>Èç¹ûÊäÈëµÄ×Ö´óÓÚ buf µÄ´óС£¬ÔòÓÐÒç³öµÄÇé¿ö.


6.streadd()
strecpy() ²»ÊÇÿ̨»úÆ÷¿ªÊ¼¾ÍÓÐÕâЩµ÷Óã¬ÄÇЩÓÐÕâЩº¯ÊýµÄ³ÌÐòÔ±£¬ÔÚʹÓÃËüÃÇʱ£¬Ó¦¸ÃСÐÄ¡£ÕâЩº¯Êý¿ÉÒÔ½«ÄÇЩº¬Óв»¿É¶Á×Ö·ûµÄ×Ö·û´®×ª»»³É¿É´òÓ¡µÄ±íʾ¡£Èç¹û³ÌÐòԱûÓÐÔ¤Áϵ½ÐèÒª¶à´óµÄÊä³ö»º³åÇøÀ´´¦ÀíÊäÈ뻺³åÇø£¨²»·¢Éú»º³åÇøÒç³ö£©£¬Ôò streadd() ºÍ strecpy() º¯Êý¿ÉÄÜÓÐÎÊÌâ¡£Èç¹ûÊäÈ뻺³åÇø°üº¬µ¥Ò»×Ö·û ¨D ¼ÙÉèÊÇ ASCII 001£¨control-A£©¨D ÔòËü½«´òÓ¡³ÉËĸö×Ö·û¡°\001¡±¡£ÕâÊÇ×Ö·û´®Ôö³¤µÄ×Çé¿ö¡£Èç¹ûûÓзÖÅä×ã¹»µÄ¿Õ¼ä£¬ÒÔÖÁÓÚÊä³ö»º³åÇøµÄ´óС×ÜÊÇÊäÈ뻺³åÇø´óСµÄËı¶£¬Ôò¿ÉÄÜ·¢Éú»º³åÇøÒç³ö¡£

7.strtrns()
º¯Êý strtrns() È¡Èý¸ö×Ö·û´®ºÍ½á¹û×Ö·û´®Ó¦¸Ã·ÅÔÚÆäÄÚµÄÒ»¸ö»º³åÇø£¬×÷ΪÆä×Ô±äÁ¿¡£µÚÒ»¸ö×Ö·û´®±ØÐë¸´ÖÆµ½¸Ã»º³åÇø¡£Ò»¸ö×Ö·û±»´ÓµÚÒ»¸ö×Ö·û´®Öи´ÖƵ½»º³åÇø£¬³ý·ÇÄǸö×Ö·û³öÏÖÔÚµÚ¶þ¸ö×Ö·û´®ÖС£Èç¹û³öÏֵϰ£¬ÄÇô»áÌæ»»µôµÚÈý¸ö×Ö·û´®ÖÐͬһË÷ÒýÖеÄ×Ö·û.
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_content>
#include

_content>void main(int argc, char **argv)
  {
  char lower[] = "abcdefghijklmnopqrstuvwxyz";
  char upper[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  char *buf;
  if(argc < 2) {
  printf("USAGE: %s arg\n", argv[0]);
  exit(0);
  } buf = (char *)malloc(strlen(argv[1]));
  strtrns(argv[1], lower, upper, buf);
  printf("%s\n", buf);
  }


_content>ÒÔÉÏ´úÂëʵ¼ÊÉϲ»°üº¬»º³åÇøÒç³ö¡£µ«Èç¹ûÎÒÃÇʹÓÃÁ˹̶¨´óСµÄ¾²Ì¬»º³åÇø£¬¶ø²»ÊÇÓà malloc() ·ÖÅä×ã¹»¿Õ¼äÀ´¸´ÖÆ argv[1]£¬Ôò¿ÉÄÜ»áÒýÆð»º³åÇøÒç³öÇé¿ö¡£

[ Last edited by »ÃÓ°ÎÞºÛ on 2006-11-13 at 08:12 ]
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