Hello! I’ve been trying to program a Body Mass Index(BMI) calculator. In case you don’t know what BMI is, its basically the weight of a person in kilograms divided by height in meters squared. When I was running my program, the output I was getting was not expected.
My original code for BMI calculator:
#include <stdio.h>
#include <ctype.h>
int main() {
double Weight, Height, BMI, Dummy;
char Response;
printf("Hello patient! Please enter 'Y' to continue or 'N' exit: ");
scanf("%c", &Response);
if (Response == 'y') {
do {
/*
* Asking the user for their weight.
*/
printf("Please enter your weight in kilograms: ");
scanf(" %f", &Weight);
/*
* Asking the user for their height.
*/
printf("Now, please enter your height in meters: ");
scanf(" %f", &Height);
/*
* Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meter.
* Also Calculate Body Mass Index(BMI).
* Then print BMI.
*/
BMI = Weight / (Height * Height);
printf("Your Body Mass Index (BMI) is %2.1f.\n", BMI);
/*
* Now we will inform the user whether their BMI is good or not.
* If your BMI is less than 18.5, it falls within the underweight range.
* If your BMI is 18.5 to 24.9, it falls within the Healthy Weight range.
* If your BMI is 25.0 to 29.9, it falls within the overweight range.
*/
if (BMI < 18.5) {
printf("You're BMI falls within Underweight Range.\n");
} else if (BMI >= 18.5 && BMI <= 24.9) {
printf("You're BMI falls within Healthy Weight Range.\n");
} else if (BMI >= 25.0 && BMI <= 29.9) {
printf("You're BMI falls within Overweight Range./n");
}
/*
* Ask the user if wants to check BMI again.
*/
printf("Do you want to check your Body Mass Index (BMI) again? ");
scanf(" %c", &Response);
Response = toupper(Response);
} while (Response == 'Y');
}
}
Later, I coded a more simpler program of the BMI calculator, in case there was something wrong with my code of the above program. But it was also showing a more different unexpected result than the above. The simpler code is as below:
#include <stdio.h>
int main() {
double weight, height, heightSq, bmi;
// For weight.
printf("Your weight: ");
scanf(" %f", &weight);
// For height.
printf("Your height: ");
scanf(" %f", &height);
// Calculating BMI.
bmi = weight / (height * height);
printf("Your BMI is %2.1f.\n");
return 0;
}
I can’t understand what’s wrong here. Please tell me what is wrong with my program.
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