#include <stdio.h> int main() { double x1, x2 = 0; char operate = 0; double result = 0; scanf("%lf%c%lf",&x1,&operate,&x2); switch (operate) { case '+': result = x1 + x2; printf("%.4lf+%.4lf=%.4lf",x1,x2,result); break; case '-': result = x1 - x2; printf("%.4lf-%.4lf=%.4lf",x1,x2,result); break; case '*': result = x1 * x2; printf("%.4lf*%.4lf=%.4lf",x1,x2,result); break; case '/': if (x2 == 0.0) { printf("Wrong!Division by zero!"); break; } result = x1 / x2; printf("%.4lf/%.4lf=%.4lf",x1,x2,result); break; default: printf("Invalid operation!"); } return 0; }