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The C++ strtok function tokenizes a string. It splits a source string into segments called tokens that are separated by any of a specified set of characters called delimiters. Strtok takes the...
The C++ memcmp function compares a specified number of bytes of two blocks of memory. It returns 0 if they all match and a nonzero value to indicate which value is greater. The following steps...
The memcpy function in C++ copies the specified number of bytes of data from the specified source to the specified destination. This is a binary copy so the underlying data type is irrelevant. The...
The memmove function in C++ copies the specified number of bytes of data from the specified source to the specified destination. This function is called a move because it uses an intermediate...
The C++ memset function is short for "memory set." It sets a specified block of memory to a specified character, overwriting the original data. It does not check for overflow and does not use an...
The C++ strcat function is short for "string concatenate." Strcat appends a copy of a source string to a destination string. The null terminator character in the destination will be overwritten by...
The C++ strchr function locates the first occurrence of a specified character in a source string and returns a pointer to that location. This includes the null character so strchr also can be used...
The C++ strcpy function copies a string from a source location to a destination location and provides a null character to terminate the string. The destination should be large enough to contain...
The C++ strcspn function searches a source string for the first occurrence of characters in a list and returns the number of characters read. This can include the terminating null character, so...
The C++ strncat function appends up to a specified number of characters to a destination string. The null terminator character in the destination string will be overwritten by the first character...
The C++ strpbrk function searches a source string for the first occurrence of characters in a list and returns a pointer to that first occurrence. If there are no matches in the source string,...
The C++ strrchr function searches a source string for the last occurrence of a specified character and returns a pointer to that occurrence. If there are no matches in the source string, strrchr...
The C++ strspn function determines the length of the maximum initial part of a source string that consists only of characters in a specified list. If every character in the source string appears...
The C++ strstr function locates a specified substring within a source string. The scan does not include terminating null-characters. Strstr returns a pointer to the first occurrence of the...
The C++ memchr function searches a specified number of bytes in a block of memory for the first occurrence of a specified value. It returns a pointer to this location and a null pointer if the...
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