C Language and PHP Programming Problem Bank & Solutions: A Practical Guide to Improving Your Coding Skills

Introduction

In today's tech-driven world, programming skills are more important than ever. Whether you're a beginner or an experienced developer, learning C and PHP can significantly boost your career prospects. This article offers a detailed C and PHP programming problem bank with solutions, aimed at helping you improve your coding skills.

C Programming Problem Bank

C is a low-level language widely used in system software, embedded systems, and high-performance applications. Below are some classic C programming problems:

Factorial Calculation

Write a function to calculate the factorial of a given number.

#include <stdio.h>
int factorial(int n) {
    if (n < 0) return -1;
    if (n == 0) return 1;
    return n * factorial(n - 1);
}
int main() {
    int num = 5;
    printf("Factorial of %d is %d\n", num, factorial(num));
    return 0;
}

Prime Number Check

Write a function to check if a given number is a prime number.

#include <stdio.h>
#include <stdbool.h>
bool isPrime(int n) {
    if (n <= 1) return false;
    for (int i = 2; i * i <= n; i++) {
        if (n % i == 0) return false;
    }
    return true;
}
int main() {
    int num = 11;
    if (isPrime(num)) {
        printf("%d is a prime number.\n", num);
    } else {
        printf("%d is not a prime number.\n", num);
    }
    return 0;
}

PHP Programming Problem Bank

PHP is a widely used scripting language, primarily for web development. Below are some common PHP programming problems:

String Reversal

Write a function to reverse a given string.

function reverseString($str) {
    return strrev($str);
}
$input = "Hello, World!";
echo "Reversed string: " . reverseString($input) . "\n";

Find Maximum Value in an Array

Write a function to find the maximum value in a given array.

function findMax($arr) {
    return max($arr);
}
$array = [1, 2, 3, 4, 5];
echo "Maximum value: " . findMax($array) . "\n";

Conclusion

By going through the C and PHP programming problem bank and solutions, you can effectively practice coding skills and enhance your problem-solving abilities. Mastering these programming languages will lay a solid foundation for your career in IT. Continuously exploring more programming problems and solutions will help you grow as a developer and improve your technical expertise.