cstring.md

description	Learn more about: <cstring>
title	<cstring>
ms.date	11/04/2016
f1_keywords	<cstring>
helpviewer_keywords	<cstring> header cstring header
ms.assetid	d665429f-5d39-4712-9c0a-68c8abcc3536

<cstring>

Includes the Standard C library header <string.h> and adds the associated names to the std namespace.

Syntax

#include <cstring>

Remarks

Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the std namespace.

Constants

namespace std {
    using size_t = see below;
}

#define NULL

Functions

void* memcpy(void* s1, const void* s2, size_t n);
void* memmove(void* s1, const void* s2, size_t n);
char* strcpy(char* s1, const char* s2);
char* strncpy(char* s1, const char* s2, size_t n);
char* strcat(char* s1, const char* s2);
char* strncat(char* s1, const char* s2, size_t n);
int memcmp(const void* s1, const void* s2, size_t n);
int strcmp(const char* s1, const char* s2);
int strcoll(const char* s1, const char* s2);
int strncmp(const char* s1, const char* s2, size_t n);
size_t strxfrm(char* s1, const char* s2, size_t n);
const void* memchr(const void* s, int c, size_t n); // see 20.2
void* memchr(void* s, int c, size_t n) // see 20.2
const char* strchr(const char* s, int c) // see 20.2
char* strchr(char* s, int c) // see 20.2
size_t strcspn(const char* s1, const char* s2);
const char* strpbrk(const char* s1, const char* s2) // see 20.2
char* strpbrk(char* s1, const char* s2) // see 20.2
const char* strrchr(const char* s, int c) // see 20.2
char* strrchr(char* s, int c) // see 20.2
size_t strspn(const char* s1, const char* s2);
const char* strstr(const char* s1, const char* s2) // see 20.2
char* strstr(char* s1, const char* s2) // see 20.2
char* strtok(char* s1, const char* s2);
void* memset(void* s, int c, size_t n);
char* strerror(int errnum);
size_t strlen(const char* s);

See also

Header Files Reference
C++ Standard Library Overview
Thread Safety in the C++ Standard Library