#include<stdio.h>
int main(void）
{
double value1,value2;
char op;
printf("Type in an expression:");
scanf("%lf%c%lf",&value1&op&value2);
if(op=='+')
printf("=%.2f\n",value1+value2);
else if(op=='-')
printf("=%.2f\n",value1-value2);
else if(op=='*')
printf("=%.2f\n",value1*value2);
else if(op=='/')
printf("=%.2f\n",value1/value2);
else
printf("Unknown opterator\n");
return 0;
}