Question

我一直坚持这个已经在这个问题上创建了一段时间的程序。没有人能真正帮助我。我只是想知道如何使void工作，因为里面的变量无法定义。

void PoorRating(Questionnaire RatingDetails[], int i){
    for(i=0;i<100;i++){
        if(RatingDetails[i].Rating >=1 && RatingDetails[i].Rating <=3){
        }
        cout << "Information: " << endl << "Name: " << Customer[i].Title << " " << Customer[i].Surname;
    }
}

int main(){
    char AnotherQ;
    int largestgroup;
    Questionnaire Customer[100];//set an array
    int i=0;
    do{
        cout << "Please enter Customer title: "; cin >> Customer[i].Title;
        cout << "Please enter Customer surname: ";cin >> Customer[i].Surname;
        cout << "Please Enter Telephone: "; cin >> Customer[i].Telephone;//set to college the customer's telephone number
        Customer[i].Telephone=ValidateTelephone(Customer,i); //Continues to ValidateTelehpone number operation
        cout << "Please Enter Group Size: "; cin >> Customer[i].Groupsize;
        Customer[i].Groupsize=ValidateGroupSize(Customer,i);//Continues to ValidateGroupSize number operation
        cout << "Please Enter Rating of meal: "; cin >> Customer[i].Rating;
        Customer[i].Rating=ValidateRating(Customer,i);//Continues to ValidateRating operation
        cout<<"Do you want to Continue(y/n)? "; cin>>AnotherQ;//Asks if user wants to continue or end program
        i++;
    } while(AnotherQ=='y' || AnotherQ=='Y');

    largestgroup=FindingLargestGroup(Customer, i);  
        cout << "Largest Group: " << largestgroup << endl;//displays information

    CounterRating(Customer ,i);
    PoorRating(Customer,i);

    system("pause");
    return 0;
}

Answer 1

如果我在ideone with GCC 4.3.2上编译代码，我会收到以下错误消息：

prog.cpp: In function 'void PoorRating(Questionnaire*, int)':
prog.cpp:68: error: 'Customer' was not declared in this scope
prog.cpp: In function 'int main()':
prog.cpp:97: error: 'system' was not declared in this scope

在你的方法中

void PoorRating(Questionnaire RatingDetails[], int i){
    for(i=0;i<100;i++){
        if(RatingDetails[i].Rating >=1 && RatingDetails[i].Rating <=3) {

        }
    cout << "Information: " << endl 
         << "Name: " << Customer[i].Title << " " << Customer[i].Surname;
    }
}

您正在尝试引用在Customer中声明的main()变量。你可能意味着RatingDetails。

至于遗失的system()声明，请加入<stdlib.h>。

code compiles以及上述修复程序。

修改
另请注意，您可能希望在if()语句块中输入＆quot;＆＃39; ，并省略for()循环：

void PoorRating(Questionnaire RatingDetails[], int i){ if(RatingDetails[i].Rating >=1 && RatingDetails[i].Rating <=3) { cout << "Information: " << endl << "Name: " << RatingDetails[i].Title << " " << RatingDetails[i].Surname; } }

坚持请帮助。 Void Undefined Identifier

1 个答案: