Usage of strcpy function in c++

The strcpy function is used to copy strings. Its prototype is: char strcpy(char destination, const char* source); Usage method: Pass the destination string address and source string as parameters. Note: Make sure there is enough space in the target string, null characters are not automatically added, and the behavior when overlapping strings is undefined. Alternative functions: strncpy and strlcpy are safer, prevent buffer overflows and truncate lengthy source strings.

strcpy function usage in c

strcpy function is used for copying in C one string into another string. Its prototype is:

<code class="cpp">char* strcpy(char* destination, const char* source);</code>

where:

• destination: target string (the string to be copied to)
• source: Source string (string to be copied)

Usage method

To use the strcpy function, just Just pass the address of the target string and the source string as parameters:

<code class="cpp">char dest[100];
char src[] = "Hello World";

strcpy(dest, src);</code>

After executing this code, the string "Hello World" will be copied to dest.

Notes

The following things need to be noted:

• The destination string must have enough memory space to accommodate a copy of the source string , otherwise buffer overflow may occur.
• strcpy will not automatically add the null character '\0' after the target string, so you need to add it yourself before using the target string.
• The behavior of strcpy is undefined if the destination string and source string overlap.

Replacement functions

In C, the strcpy function has been replaced by strncpy and strlcpy Replaced by safer alternative functions. These functions provide better protection against buffer overflows and truncate the copy if the source string is longer than the destination string.

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