#include
int main()
{
float a1 = 0, a2 = 0;
char c = " ";
do {
printf("Input an arithmetic operation (press 0 0 0 to finish program)\n");
scanf("%f%c%f", &a1, &c, &a2);
if (c == "+")
printf("= %.2f\n", (a1 + a2));
else if (c == "-")
printf("= %.2f\n", (a1 - a2));
else if (c == "*")
printf("= %.2f\n", (a1 * a2));
else if (c == "/")
printf("= %f\n", (a1 / a2));
else
printf("Please input correct expression\n\n");
