C Programming

The Party Planning

You’re an engineer tasked with organizing a small party. The success of your event relies in inviting guests, making arrangement for food based on guests invited.

Input: Gathering Information

First, you need to know how many guests are coming and what they want to eat. This is akin to input in programming, where you collect data from users. In C, this can be done using scanf, which prompts the user to enter values. For example, you might ask guests, “How many people are you inviting?” and “What would you like for dinner?”

Processing: Making Decisions

• Next comes the processing stage. This is where you evaluate the information gathered. If you know you have 10 guests and they’ve chosen pizza, you’ll need to calculate how many pizzas to order. In programming, this is similar to performing operations on the data you received, such as adding numbers to find a total. This is where logic, algorithms, and calculations come into play.

Output: Sharing Results

• Finally, you want to relay the plans back to your guests. You might say, “We will have 10 pizzas for the party!” This corresponds to the output in programming. In C, you use printf to display results to the user, ensuring they know what to expect.

Flowchart

          ┌────────────────────────┐
          │ Start                  │
          └──────────┬────────────┘
                     ▼
          ┌────────────────────────┐
          │ Prompt for number of    │
          │ guests                  │
          └──────────┬────────────┘
                     ▼
          ┌────────────────────────┐
          │ Read guest count        │
          └──────────┬────────────┘
                     ▼
          ┌────────────────────────┐
          │ Calculate number of     │
          │ pizzas needed           │
          └──────────┬────────────┘
                     ▼
          ┌────────────────────────┐
          │ Display pizza count     │
          └──────────┬────────────┘
                     ▼
          ┌────────────────────────┐
          │ End                    │
          └────────────────────────┘

Code

#include <stdio.h>

int main() {
    int guests, pizzas;

    // Input: Gathering Information
    printf("Enter the number of guests: ");
    scanf("%d", &guests);

    // Processing: Making Decisions
    pizzas = guests / 3;  // Assuming each pizza serves 3 people

    // Output: Sharing Results
    printf("You need to order %d pizzas for the party.\n", pizzas);

    return 0;
}

• Identify the required information (input).
• Develop the logic to manipulate this information (processing).
• Deliver the results clearly (output).