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strcpy, wcscpy, _mbscpy

Copies a string. More secure versions of these functions are available; see strcpy_s, wcscpy_s, _mbscpy_s.

Important note Important

_mbscpy cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW.

char *strcpy(
   char *strDestination,
   const char *strSource 
);
wchar_t *wcscpy(
   wchar_t *strDestination,
   const wchar_t *strSource 
);
unsigned char *_mbscpy(
   unsigned char *strDestination,
   const unsigned char *strSource 
);
template <size_t size>
char *strcpy(
   char (&strDestination)[size],
   const char *strSource 
); // C++ only
template <size_t size>
wchar_t *wcscpy(
   wchar_t (&strDestination)[size],
   const wchar_t *strSource 
); // C++ only
template <size_t size>
unsigned char *_mbscpy(
   unsigned char (&strDestination)[size],
   const unsigned char *strSource 
); // C++ only
strDestination

Destination string.

strSource

Null-terminated source string.

Each of these functions returns the destination string. No return value is reserved to indicate an error.

The strcpy function copies strSource, including the terminating null character, to the location that's specified by strDestination. The behavior of strcpy is undefined if the source and destination strings overlap.

Security note Security Note

Because strcpy does not check for sufficient space in strDestination before it copies strSource, it is a potential cause of buffer overruns. Therefore, we recommend that you use strcpy_s instead.

wcscpy and _mbscpy are, respectively, wide-character and multibyte-character versions of strcpy. The arguments and return value of wcscpy are wide-character strings; those of _mbscpy are multibyte-character strings. These three functions behave identically otherwise.

In C++, these functions have template overloads that invoke the newer, secure counterparts of these functions. For more information, see Secure Template Overloads.

Generic-Text Routine Mappings

TCHAR.H routine

_UNICODE & _MBCS not defined

_MBCS defined

_UNICODE defined

_tcscpy

strcpy

_mbscpy

wcscpy

Routine

Required header

strcpy

<string.h>

wcscpy

<string.h> or <wchar.h>

_mbscpy

<mbstring.h>

For additional compatibility information, see Compatibility.

// crt_strcpy.c
// compile with: /W3
// This program uses strcpy
// and strcat to build a phrase.

#include <string.h>
#include <stdio.h>

int main( void )
{
   char string[80];

   // If you change the previous line to
   //   char string[20];
   // strcpy and strcat will happily overrun the string
   // buffer.  See the examples for strncpy and strncat
   // for safer string handling.

   strcpy( string, "Hello world from " ); // C4996
   // Note: strcpy is deprecated; use strcpy_s instead
   strcat( string, "strcpy " );           // C4996
   // Note: strcat is deprecated; use strcat_s instead
   strcat( string, "and " );              // C4996
   strcat( string, "strcat!" );           // C4996
   printf( "String = %s\n", string );
}
String = Hello world from strcpy and strcat!
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