The role and usage of strcpy in c language

strcpy is a standard library function for copying strings in C language. It copies the source string to the target string and returns the target string address. The usage is: strcpy(char dest, const char src), where dest is the destination string address and src is the source string address.

The role and usage of strcpy in C language

strcpy is used to copy strings in C language A standard library function.

Function

The function of strcpy is to copy the source string (the copied string) to the target string (the copied string).

Usage

The syntax of strcpy function is:

<code class="c">char *strcpy(char *dest, const char *src);</code>

where:

• dest is the address of the target string .
• src is the address of the source string.

Return value

strcpy returns the address of the target string, which is dest.

Detailed explanation

The strcpy function copies the src string to the dest string until the null character '\0' is encountered. It does not check whether the destination string's buffer is large enough, so a buffer overflow error may result if the source string is longer than the destination string.

The following example shows the usage of strcpy:

<code class="c">#include <stdio.h>
#include <string.h>

int main() {
    char dest[100];
    char src[] = "Hello World";

    strcpy(dest, src);

    printf("Copied string: %s\n", dest);

    return 0;
}</code>

In this example, strcpy copies the src string ("Hello World") into the dest string. Then output the dest string and display the copied result.

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