C program to print Hex values of characters in string

Following program prints the hexadecimal values of all the characters in any string. Currently we have used a static string for the demonstration, but you can write your own function to print hex values by passing string as input argument to the function for the debugging purpose and call that function as and when necessary.

$ vim char_to_hex.c
#include <stdio.h>
#include <string.h>
int main(int argc, char **argv) {
        unsigned char any_string[] = "helloworld";
        int i;
        for (i=0; i < strlen(any_string); i++ )
                printf("%2x ",any_string[i] & 0xff);
        return 0;

Compile this program as,

$  gcc -o char_to_hex char_to_hex.c

Execute the binary as,

$ ./char_to_hex
68 65 6c 6c 6f 77 6f 72 6c 64

As you can see above, we can see the Hex equivalent for the characters “Helloworld” is print by the program.


Subscribe with Valid Email Id to receive updates in Inbox. ( Secured by Google FeedBurner )


Leave a Comment

Android Android Applications Android Build system Android Commands Application Libraries Application Stack / User Interface Bash / Shell Scripts Bluetooth driver Cloud Technologies Commands and Packages Compilation Content Management System Core Kernel C Programs Development & Build Development, Debugging and Performance Tools Development Environment Setup Django & REST Api Errors & Failures Git Hardware Platforms HTML JAVA Programs Linux, OS Concepts and Networking Linux Device Drivers Linux Host, Ubuntu, SysAdmin Linux Kernel Linux Networking Middleware Libraries, HAL Multimedia Audio, Video, Images NDK / Middleware / HAL OS Concepts PHP Programming Languages Scripting and Automation Search Engine Optimisation ( SEO ) Social Media Source Code Management ( SCM ) System Administration, Security Testing and Debugging Uncategorized Web design and development Website Hosting Wordpress Yocto / Bitbake / Openembedded