C Exercises: Calculate body mass index and display the grade

C Basic Declarations and Expressions: Exercise-94 with Solution

Write a C program to calculate body mass index and display the grade from the following grades:
Underweight - BMI < 18.5
Normal weight - 18.5 <= BMI < 25.0
Overweight - 25.0 <= BMI < 30.0
Obesity - 30.0 <= BMI
Where weight is taken in kilograms and height in meters.
Body Mass Index (or BMI) is calculated as your weight (in kilograms) divided by the square of your height (in metres) or BMI = Kg/M².

Sample Solution:

C Code:

#include <stdio.h>

void BMI (int, float);
int main(void)
{
  int w;
  float h;
       printf("Input the weight: ");
       scanf("%d", &w);
       printf("Input the height: ");
       scanf("%f", &h);
       BMI(w, h);
}

void BMI (int weight, float height){
    float temp = weight/ (height * height);
    printf("BMI = %f\n", temp);
    printf("\nGrade: ");
    temp < 18.5 ? printf("Under ") : temp < 25 ? printf("Normal ") : temp < 30 ? printf("Over ") : temp < 40 ? printf("Obese ") : printf("Error");
} 

Sample Output:

Input the weight: 65
Input the height: 5.6
BMI = 2.072704

Grade: Under

Flowchart:

C programming Code Editor:

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