{}
#include <stdio.h>
int main() {
int choice;
float height, weight, BMI;
char weight_check, height_check;
printf("=== Welcome to the BMI Calculator ===\n");
do {
// Reset validation flags
weight_check = 'n';
height_check = 'n';
// Get valid weight
while (weight_check != 'k') {
printf("Please enter your weight in kilograms (2.0 - 900.0): ");
scanf("%f", &weight);
if (weight >= 2.0 && weight <= 900.0) {
weight_check = 'k';
printf("Thank you for your input.\n");
} else {
printf("Invalid weight. Try again.\n");
}
}
// Get valid height
while (height_check != 'k') {
printf("Please enter your height in meters (0.5 - 4.5): ");
scanf("%f", &height);
if (height >= 0.5 && height <= 4.5) {
height_check = 'k';
printf("Thank you for your input.\n");
} else {
printf("Invalid height. Try again.\n");
}
}
// Calculate BMI
BMI = weight / (height * height);
printf("\nYour BMI is: %.2f\n", BMI);
// Determine BMI category
if (BMI < 18.5) {
printf("You are underweight.\n");
} else if (BMI >= 18.5 && BMI <= 24.9) {
printf("You have a normal weight.\n");
} else if (BMI >= 25 && BMI <= 29.9) {
printf("You are overweight.\n");
} else {
printf("You are obese.\n");
}
// Menu for user
printf("\nMenu:\n");
printf("1. Calculate BMI again\n");
printf("2. Exit\n");
printf("Enter your choice: ");
scanf("%d", &choice);
} while (choice == 1);
printf("Thank you for using the BMI Calculator. Goodbye!\n");
return 0;
}