我是学习C++的过程。我在 VC++ 上调试我的一些代码时遇到了以下错误 -
Debug Error
*path to filename.exe*
Invalid allocation size:429496723 bytes.
当调试器到达以下块时，该错误恰好发生：编辑：我添加了整个 main 函数以帮助检查maxlen是否具有任何意外值（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;
}