Question

我完成了上课的代码，但是我在函数下的括号中不断出现错误，我在上课时做到了，这不是问题。你们知道我在做什么错吗？我尝试过查找，但是我找不到真正解决特定问题的具体解决方案。

#include <iostream>

using namespace std;

int getGrades(int[], int);

void calcStats(int[], int, int&, int&, double&);
int main()
{
    const int size = 20;
    int grades[size];

    int count = getGrades(grades, size);

    int highGrade = 0;
    int lowGrade = 100;
    double average = 0;

    calcStats(grades, count, highGrade, lowGrade, average);

    cout << "Lowest Grade: " << lowGrade << endl;
    cout << "Highest Grade: " << highGrade << endl;
    cout << "Average Grade: " << average << endl;

    system("pause");
    return 0;
}

int getGrades(int Grades[], int size); 
{ // error "expected a declaration"
    int count = 0;
    int grade;
    cout << "Please enter up to 20 grades followed by a -1 when done." << endl;
    cin >> grade;
    while (grade != -1)
    {
        grades[count] = grade;
        count++;

        if (count == 20) {
            break;
        }
        cin >> grade;
    }
    return count;
}


void calcStats(int grades[], int size,int& highGrade, int& lowGrade, double& average);
{ // error "expected a declaration"
    int total = 0;
    highGrade;
    lowGrade;

    for (int i = 0; i < size; i++) {
        total += grades[i];
        if (grades[i] > highGrades) {
            highGrades = grades[i];
        }
        if (grades[i] < lowGrades) {
            lowGrades = grades[i];
        }
    }
    average = static_cast<double>(total) / size;
}

Answer 1

您的前向声明后面有半冒号是正确的：

Children

如上面的评论所指出，定义本身不应该带有分号，而只能是大括号：

int getGrades(int[], int);
void calcStats(int[], int, int&, int&, double&);

一个不错的经验法则是，如果您使用牙套，则无需使用分号。

您的int getGrades(int Grades[], int size) // no semi colon { // error "expected a declaration" }函数似乎也带有getGrades而不是Grades的错字，但是我认为这是从您的IDE到此处问题的笔录错误，与您的问题无关问题。

如何解决“预期的声明”？

1 个答案: