# include<stdio.h> int main(void) { double value1,value2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&value1,&op,&value2); switch(op){ case'+': printf("=%.2f ",value1 + value2); break; case'-': printf("=%.2f ",value1 - value2); case'*': printf("=%.2f ",value1 * value2); case'/': printf("=%.2f ",value1 /value2); break; default: printf: printf("Unknoen operator "); break; } return 0; }