注意：
（1）switch case只能是一个字节

include[HTML_REMOVED]

using namespace std;
int main()
{
double a;
scanf(“%lf”,&a);
if(a<0||a>100)
printf(“Fora de intervalo”);
else
if(a>=0&&a<=25)
printf(“Intervalo [0,25]”);
if(a>25&&a<=50)
printf(“Intervalo (25,50]”);
if(a>50&&a<=75)
printf(“Intervalo (50,75]”);
if(a>75&&a<=100)
printf(“Intervalo (75,100]”);
return 0;
}