The role of strcpy function in c language

The function of strcpy function in C language is to copy one string to another string, overwriting the target string and ending with '\0'. It needs to ensure that there is enough memory space for the target string and does not check the buffer size. strcpy only copies the contents of the string, not the length or attributes. If the source and target point to the same string, it overwrites its own contents.

The role of strcpy function in C language

The strcpy function is a commonly used string copy function in C language. Used to copy the contents of one string to another string. The syntax format is as follows:

<code>char *strcpy(char *destination, const char *source);</code>

Among them:

• destination: The first address of the string to be copied to.
• source: The first address of the string to be copied.

Function:

The strcpy function copies the string pointed to by source to the string pointed by destination until it encounters '\0' (null character ). It overwrites the existing content in the destination and always ends with '\0'.

Return value:

strcpy returns the first address of the string pointed to by destination.

Usage:

When using the strcpy function, you need to ensure that the destination has enough memory space to accommodate the source string, otherwise buffer overflow may occur.

Example:

<code class="c">char src[] = "Hello";
char dest[10];

strcpy(dest, src);

printf("%s\n", dest); // 输出：Hello</code>

Note:

• strcpy does not check the buffer size, so manual Make sure the destination has enough space.
• strcpy will only copy the content of the string, not the string length or other attributes.
• If source and destination point to the same string, strcpy will overwrite its own content.

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