Wrong result when calculating BMI

Question

I am doing an exercise with the C language to calculate the BMI, there is no error in the compiler but the result goes wrong, I have already looked at the code and I do not find the error at all.

The code is as follows::

#include <stdio.h>
#include <stdlib.h>
#include <locale.h>

int main()
{
    setlocale(LC_ALL,"PORTUGUESE");
    printf("Claculo de imc\n");
    //variaveis peso e altura
    double peso;
    double altura;
    printf("Por favor digite seu peso: ");
    scanf("%f",&peso);
    printf("por favor digite sua altura: ");
    scanf("%f",&altura);



  double imc;
  imc = peso/(altura *altura );
  printf("Seu imc é de %.2f",imc);



    system("pause");
    return 0;
}

Answer 1

The problem was that you were using the format %f instead of %lf, which is the right one to use with the double. Just change to %lf in both printf and scanf.

In the printf is optional but is recommended.

Altered code:

#include <stdio.h>
#include <stdlib.h>
#include <locale.h>

int main()
{
    setlocale(LC_ALL,"PORTUGUESE");
    printf("Claculo de imc\n");
    //variaveis peso e altura
    double peso;
    double altura;
    printf("Por favor digite seu peso: ");
    scanf("%lf",&peso);
    printf("por favor digite sua altura: ");
    scanf("%lf",&altura);

    double imc;
    imc = peso/(altura *altura );
    printf("Seu imc é de %.2lf",imc);

    system("pause");
    return 0;
}