std::strcpy

 

C++

Language

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Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Atomic operations library (C++11)

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Technical Specifications

 

Strings library

Null-terminated strings

Byte strings

Multibyte strings

Wide strings

Classes

basic_string

basic_string_view (C++17)

char_traits

 

Null-terminated byte strings

Functions
Character manipulation
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
Conversions to numeric formats
atof atoiatolatoll (C++11) strtolstrtoll (C++11)	strtoulstrtoull (C++11) strtofstrtodstrtold (C++11)(C++11) strtoimaxstrtouimax (C++11)(C++11)
String manipulation
strcpy
strncpy
strcat
strncat
strxfrm
String examination
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Memory manipulation
memchr
memcmp
memset
memcpy
memmove
Miscellaneous
strerror

 

Defined in header <cstring>
char* strcpy( char* dest, const char* src );

Copies the character string pointed to by src, including the null terminator, to the character array whose first element is pointed to by dest.

The behavior is undefined if the dest array is not large enough. The behavior is undefined if the strings overlap.

Parameters

dest	-	pointer to the character array to write to
src	-	pointer to the null-terminated byte string to copy from

Return value

dest

Example

Run this code

#include <iostream>
#include <cstring>
#include <memory>
 
int main()
{
    const char* src = "Take the test.";
//  src[0] = 'M'; // can't modify string literal
    auto dst = std::make_unique<char[]>(std::strlen(src)+1); // +1 for the null terminator
    std::strcpy(dst.get(), src);
    dst[0] = 'M';
    std::cout << src << '\n' << dst.get() << '\n';
}

Output:

Take the test.
Make the test.

See also

strncpy	copies a certain amount of characters from one string to another (function)
memcpy	copies one buffer to another (function)
C documentation for strcpy