A program to find the largest number among three numbers

Goal: To develop a program that determines and displays the largest number among three input values (a, b, and c).

C Program:

    #include <stdio.h>

    int main() {
      // Declare variables to hold three numbers and the largest number
      float a, b, c;

      // Request user input for three numbers
      printf("Enter three numbers: ");
      scanf("%f %f %f", &a, &b, &c);

      // Check for equality of all three numbers
      if (a == b && b == c) {
        printf("All numbers are equal.\n");
      }
      // Determine the largest number
      else {
        // Calculate maximum of a and b
        float max_ab = a >= b ? a : b;

        // Compare max_ab and c to find the overall largest number
        float largest = max_ab >= c ? max_ab : c;

        // Display the largest number
        printf("The largest number is %f.\n", largest);
      }

      return 0;
    }
  

Explanation:

• We include the necessary header file, <stdio.h>, for input and output operations.
• The program starts with the main function.
• Three float variables (a, b, and c) are declared to store the input numbers and the largest number.
• The user is prompted to enter three numbers, which are read using scanf and stored in the respective variables.
• We first check if all three numbers are equal using the condition if (a == b && b == c).
• If all numbers are equal, we display a message indicating that.
• Otherwise, we proceed to find the largest number.
• We calculate the maximum of a and b using the ternary operator.
• If a is greater than or equal to b, max_ab is assigned the value of a; otherwise, it is assigned the value of b.
• We then compare max_ab and c to determine the overall largest number using the same ternary operator approach.
• Finally, we display the largest number using printf.

This program efficiently finds and displays the largest number among three input values, handling the case of equal numbers as well.