count char in string

Programming has been a headache recently. This type of conversion can be done by knowing that it can be switched, but it is always hard to remember. I will keep searching through the Internet and summarize it here. For future convenience, of course,

/*2009-11-14 14:27:331. The char string ends with the string end symbol '/0 '. The string name is the address of the first character,So when we pass the string name as a parameter to the function, we actually pass the address into the function.Since

Reference: http://blog.csdn.net/procedure1984/article/details/5419616The difference between one or three peopleBoth string and char arrays are a piece of memory that holds contiguous characters.string memory for specific characters is transparent to

1) String manipulation strcpy (P, p1) copy stringstrncpy (P, p1, N) copy the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append specified length stringStrlen (p) Take string lengthstrcmp (P, p1) comparison stringSTRCASECMP

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copy the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append specified length stringStrlen (p) Take string lengthstrcmp (P, p1) comparison stringSTRCASECMP

/*File: String. h# Ifndef _ linux_string_h _# DEFINE _ linux_string_h _ /* We don't want strings. h stuff being user by user stuff by accident */ # Ifdef _ KERNEL __ # Include /* For size_t */# Include /* For null */# Include /* for inline

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copies the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append a specified length stringStrlen (p) Take string lengthstrcmp (P, p1) compare stringsSTRCASECMP

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copies the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append a specified length stringStrlen (p) Take string lengthstrcmp (P, p1) compare stringsSTRCASECMP

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copies the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append a specified length stringStrlen (p) Take string lengthstrcmp (P, p1) compare stringsSTRCASECMP

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copies the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append a specified length stringStrlen (p) Take string lengthstrcmp (P, p1) compare stringsSTRCASECMP