Implementation of strncat() in c
C Programming: How to Write Your Own strncat() Function
The implementation of strncat() in C is a function that appends the specified number of characters from the source string at the end of the destination string and returns a pointer to the destination string.
The strncat()
function is declared in the <string.h>
header file and its syntax is as follows:
char *strncat(char *dest, const char *src, size_t n);
Parameters:
- dest: A pointer to the null-terminated destination string.
- src: A pointer to the null-terminated source string.
- n: The number of characters to append from the source string.
Return value:
A pointer to the destination string.
#include <stdio.h>
#include <string.h>
int main() {
char dest[] = "Hello";
char src[] = ", world!";
// Append the first 5 characters from the source string to the destination string.
char *ptr = strncat(dest, src, 5);
// Print the destination string.
printf("%s\n", dest);
return 0;
}
Output:
Hello, w!
implementation of strncat() in C typically works as follows:
- It finds the end of the destination string using the strlen() function.
- It copies the first n characters from the source string to the end of the destination string.
- It appends a null-terminator character to the end of the destination string.
Simple implementation of the strncat() function in C:
char *strncat(char *dest, const char *src, size_t n) {
char *ptr = dest + strlen(dest);
while (n-- && *src != '\0') {
*ptr++ = *src++;
}
*ptr = '\0';
return dest;
}
The strncat()
function is a useful function for appending strings together. It is particularly useful when you need to append a limited number of characters from the source string.
Further Reading:
Implementation of strncat() in C
add source string at the end of destination string
comparing two string using strcmp and strncmp
Design a function to copy to copy string into destination string using strcpy and strncpy
how to implement implementation of strncpy in c
Design a function to calculate the length of the string using strlen
pre defined string based function
Design a function using my_strcpy and using my_strchr we need to select given char in given string
Enroll Now:
[ C-Programming From Scratch to Advanced 2023-2024] "Start Supercharging Your Productivity!"
Contact Us:
- For any inquiries, please email us at [[email protected]].
- Follow us on insta [ electro4u_offical_ ] for updates and tips.
Note: If you encounter any issues or specific errors when running this program, please let me know and I'll be happy to help debug them!