#define _CRT_SECURE_NO_WARNINGS 1 #include <stdio.h> #include <string.h> int main() { double op1 = 0; double op2 = 0; char op = 0; while (3 == scanf("%lf%c%lf", &op1, &op, &op2)) { if ('*' == op) { printf("%.4lf*%.4lf=%.4lf", op1, op2, op1 * op2); ...