The scanf don't store my sum : <p>When the code run, my scanf don't show the sum, just 0.00000000.</p>

<p>I don't know where is the problem.</p>

<pre><code>int main() {

float A, B;
float R = A+B;


printf("Digita o valor A:  ");
scanf("%f",&amp;A);
printf("Digite o valor B:  ");
scanf("%f",&amp;B);
printf("A soma de %f e %f foi igual a: %f",A,B,R);

return 0; }
</code></pre>
