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C Program to Solve Two Sum Using Brute Force (With Algorithm & Output)

 Introduction The Two Sum problem is a popular coding interview question where we must find two indices of an array whose values add up to a given target. This program demonstrates a simple brute-force solution in C using nested loops and dynamic memory allocation. Problem Statement Given an integer array and a target value, return the indices of the two numbers such that they add up to the target. Each input has exactly one solution, and the same element cannot be used twice. The result should return the indices, not the values. If no solution exists, return NULL.  Algorithm / Logic Explanation Start the program. Traverse the array using a loop from index 0 to numsSize - 1 . Inside this loop, use another loop starting from i + 1 to numsSize - 1 . For every pair (i, j) , check if nums[i] + nums[j] == target . If condition becomes true: Allocate memory for 2 integers using malloc() . Store indices i and j . Set returnSize = 2 . Return the result poi...
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Reverse Word Order in C

Reverse Word Order in C

✅ Reverse Word Order in C

#include <stdio.h>

int main() {
    char str[200];           // To store the full input string
    char words[50][50];      // 2D array to store individual words
    int i = 0, j = 0, k = 0; // i: index in str, j: index in words, k: word count

    // Input the full line (including spaces)
    printf("Enter a string: ");
    scanf(" %[^\n]", str);  // Read input until newline

    // Split the string into words
    while (str[i] != '\0') {
        if (str[i] != ' ') {
            words[k][j++] = str[i];  // Add character to current word
        } else {
            words[k][j] = '\0';  // Terminate current word
            k++;                 // Move to next word
            j = 0;               // Reset letter index
        }
        i++;
    }
    words[k][j] = '\0';  // Terminate last word

    // Print words in reverse order
    printf("Reversed word order:\n");
    for (int l = k; l >= 0; l--) {
        printf("%s ", words[l]);
    }
    printf("\n");

    return 0;
}

📘 Explanation:

This C program reads a full string input (including spaces), splits it into individual words using space as a delimiter, and then prints the words in reverse order.

It uses a 2D character array to store each word separately. The user input is captured using scanf(" %[^\n]", str), which allows spaces in the input.

Finally, the program prints each word starting from the last to the first, effectively reversing the sentence word-by-word.

🧾 Sample Output:

Enter a string: 
Welcome to C Programming

Reversed word order:
Programming C to Welcome

🔑 Keywords:

Reverse Word Order in C, C String Manipulation, String with spaces in scanf, C Program for reversing sentence, Reverse sentence C, Array of strings in C, Split and reverse in C

📌 Hashtags:

#CProgramming #StringManipulation #ReverseWords #CLanguage #BeginnerC #StringReversal

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