Calculator is not capturing the second number

Question

I have a code that I wrote, it takes two numbers and sums, subtracts, multiplies and divides. However, when incrementing the questions in the code and then running it reads only the number of the first question.

Where am I wrong? Since apparently the code has no error.

error while compiling:

follows the code:

---

#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
int main()
{

setlocale(LC_ALL, "Portuguese");
printf("===============\n");
printf("CALCULADORA 1.0");
printf("\n===============\n");

  int num1, num2, soma, subtracao, multi, div;

  soma = num1 + num2;
  subtracao = num1-num2;
  multi = num1 * num2;
  div = num1 / num2;

  printf("Digite Dois Números a serem calculados:\n");
  printf("Primeiro Número:\n");

  scanf("Primeiro Número:%i\n",&num1);

  printf("Segundo Número:\n");
  scanf("Segundo Número:%i\n",&num2);
  printf("A soma é :%i\n",soma);
  printf("A subtração é : %i \n",subtracao);
  printf("O produto é:%i \n",multi);
  printf("A divisão é :%i \n",div);

}

Answer 1

The biggest problem is that you are putting the text in the formatter of scanf(), there is only to have a data input pattern and not a text, including because the text was already written.

There are other problems. The operations are being performed before the data is read so the calculations will occur with data already existing in the memory, even because you didn’t initialize the variables. To tell the truth most variables shouldn’t even exist.

I improved on other things, paid attention to every detail of the code and took unnecessary things, at least for the current code. It was much simpler, no?

#include <stdio.h>

int main() {
    printf("===============\n");
    printf("CALCULADORA 1.0");
    printf("\n===============\n");
    printf("Digite Dois Números a serem calculados:\n");
    printf("Primeiro Número: ");
    int num1, num2;
    scanf("%d", &num1);
    printf("\nSegundo Número: ");
    scanf("%d", &num2);
    printf("\nA soma é: %d\n", num1 + num2);
    printf("A subtração é: %d\n", num1 - num2);
    printf("O produto é: %d\n", num1 * num2);
    printf("A divisão é: %d\n", num1 / num2);
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.