In C/C++, the strcpy() function is a function used to copy one string to another string

The function strcpy() is a standard library function. It is used to copy one string to another string. In C language, it is declared in the "string.h" header file, while in C language, it is declared in the cstring header file. It returns a pointer to the destination.

This is the syntax of strcpy() in C language,

char* strcpy(char* dest, const char* src);

Some key points of strcpy().

• It copies the entire string into the target string. It replaces the entire string instead of appending it.

• It does not change the source string.

The following is an example of strcpy() in C language:

Example

Online demonstration

#include <stdio.h>
#include<string.h>
int main() {
   char s1[] = "Hello world!";
   char s2[] = "Welcome";
   printf("String s1 before: %s\n", s1);
   strcpy(s1, s2);
   printf("String s1 after: %s\n", s1);
   printf("String s2 : %s", s2);
   return 0;
}

Output

String s1 before: Hello world!
String s1 after: Welcome
String s2 : Welcome

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