Recap Challenge #2

Part of the Fundamentals section of Coddy's C journey — lesson 36 of 63.

Challenge

Easy

Create a program that reads a person's weight (in kg) and height (in meters), then:

Validates that weight is between 30 and 300 kg
If weight is out of range, print: Weight out of range!
Validates that height is between 1.0 and 2.5 meters
If height is out of range, print: Height out of range!
If all validations pass, calculates and prints the BMI (Body Mass Index) with 1 decimal place
- BMI formula: weight / (height * height)
Prints the person's weight category based on BMI:
- Below 18.5: Underweight
- 18.5 to 24.9: Normal weight
- 25.0 to 29.9: Overweight
- 30.0 or higher: Obese

Example output format for valid input:

BMI: 24.8
Category: Normal weight

Try it yourself

#include <stdio.h>

int main() {
    float weight, height, bmi;
    int weight_result, height_result;
    weight_result = scanf("%f", &weight);
    height_result = scanf("%f", &height);

    // Validate input
    
    // Calculate BMI
    
    // Determine weight category
    
    // Print results
    
    return 0;
}

All lessons in Fundamentals

1Introduction

C Language Hello World!Comments Basic Program Structure

4Control Flow

If Statement If - Else Else-If Switch Case Ternary Conditional Operator Recap Challenge Nested If - Else

7Functions

Declare a Function Return Types Parameters Recap Challenge #1 Recursion Basics Function Prototypes Recap Challenge #2