- #include <ctype.h>
- /*
- * Convert a string to lowercase
- */
- char *lc(char *str)
- {
- char *t;
- for (t = str; *t; t++)
- {
- /* Convert to lowercase */
- (*t) = tolower(*t);
- }
- /* Done */
- return (str);
- }
- /*
- * Convert a string to uppercase
- */
- char *uc(char *str)
- {
- char *t;
- for (t = str; *t; t++)
- {
- /* Convert to uppercase */
- (*t) = toupper(*t);
- }
- /* Done */
- return (str);
- }
来源: http://www.phpxs.com/code/1004205/