#include <stdio.h>
#include <stdlib.h>
int main()
{
float c,a,b;
char d;
scanf("%d%c%d",a,d,b);
switch(d)
{
case'+':c=a+b;
break;
case'-':c=a-b;
break;
case'*':c=a*b;
break;
case'/':c=a/b;
break;
default:break;
}
printf("%f",c);
system("pause");
return 0;
}
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