Visual C++:无效的分配大小.为什么会这样？

Question

我是学习C++的过程.我无法在VC++上调试我的一些代码,但有以下错误 -

Debug Error
*path to filename.exe*
Invalid allocation size:429496723 bytes.

当调试器到达以下块时,精确地发生错误:编辑:我添加了整个main函数以帮助检查maxlen是否正在接受任何意外值(尽管我没有注意到)

int main(){

    vector <Student_info> students;

    Student_info record;

    string::size_type maxlen=0;// length of the longest name

    //read and store all the students data.

    //maxlen contains the length of the name of the longest student.

    while (read(cin,record)){
    // find the length of the longest name
        max(maxlen,record.name.size());
        //add the student record to the vector.

        students.push_back(record);
    }
    //arrange the records alphabetically.
    sort(students.begin(),students.end(),compare);// this may look weird but the fact that the names have to be compared is checked using the predicate.

        //write out the names and grades.


        for(vector<Student_info>::size_type i =0;i!=students.size();i++){

            //padding to ensure that there is vertical alignment.
            cout<<students[i].name<<string(maxlen+1-students[i].name.size(),' ');// debugger stops here!
            //compute grade.
            try{
                double final_grade=grade(students[i]);
                streamsize prec=cout.precision();
                cout<<setprecision(3)<<final_grade<<setprecision(prec);
            }
            catch(domain_error e){
            //catch error if hw vector is empty!

                e.what();

            }
            cout<<endl;

            }
        return 0;
        }

Answer 1

你可能会看一下这一行:

max(maxlen,record.name.size());

你的意思是:

maxlen = max(maxlen,record.name.size());