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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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C Program to Find the Smallest Element in an Array

🔍 C Program to Find the Smallest Element in an Array

#include<stdio.h>
int main( )
{
    int num, a[100];
    printf("Enter the size of the array:\n");
    scanf("%d", &num);

    if(num <= 0)
    {
        printf("Invalid array size");
        return 1;
    }

    printf("Enter %d elements into the array:\n", num);
    for(int i = 0; i < num; i++)
    {
        scanf("%d", &a[i]);
    }

    int min = a[0]; // Start by assuming first element is smallest

    for(int i = 1; i < num; i++) // Start from 1 to avoid rechecking a[0]
    {
        if(a[i] < min)
        {
            min = a[i];
        }
    }

    printf("The smallest element in the array is %d\n", min);

    return 0;
}

📝 Explanation:

This C program reads an array of integers from the user and finds the smallest element by comparing each item with a `min` variable initialized to the first element.

💡 Sample Output:

Enter the size of the array:
5
Enter 5 elements into the array:
12 5 9 30 2
The smallest element in the array is 2

🔍 Keywords:

Smallest number in array C program, find minimum element, array comparison logic, beginner C programs, interview C questions

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