C Number Utility Libraries

A collection of small C shared libraries implementing common number-property checks.

Libraries Included

• Armstrong number check
• Palindrome number check
• Perfect number check
• Prime number check
• Strong number check

Compilation (example)

gcc -c -fPIC armstrong.c -o armstrong.o
gcc -shared -o libarmstrong.so armstrong.o

Usage

#include "armstrong.h"

int main() {
    if (armstrong(153)) {
        // number is armstrong
    }
    return 0;
}

Compile with:

gcc main.c -L. -larmstrong -o main