1 2 3 4=5用加减乘除四则运算符号及括号填入下式,使等式成立。答:include <string> using namespace std;int num[5] = {1,2,3,4,5};char op[4] = {'+','-','*','/'};char *pri[5] = {"123","132","213","231","321"};double compute(double num1, char op, double num2){ switch (op){ case '+':return num1 + num2;case '-...