error attempt to erase the specific position in a string vector.

[miaOnDeLine]

I having a problem to execute the algorithm erase. My program is planned to erase the position of a string. Is it necessarily use iterator together with erase?

void Student:: dropStudent()
{
	string target;
	int position;
	cout<<"Student's name search : ";
	getline(cin,target);
	vector<string>::iterator it;
	it=find(namePtr.begin(),namePtr.end(),target);
	if(it==namePtr.end())
		cout<<"No student record. \n";
	else
	{
		cout<<"Student " <<target<<" found. \n";
		for(int i =0; i<namePtr.size();i++)
		{
			if(*it==namePtr[i])
			position=i;
		}
		cout<<"At position :"<<position+1<<endl;
		cout<<"Drop this student record? (y/n) : ";
		int sum=0;
		namePtr.erase(namePtr.begin()+position);
		cout<<"Deleted : "<<namePtr[position];
		facPtr.erase(facPtr.begin()+position);
		cout<<"Deleted : "<<facPtr[position];
		
		for(int h=0;h<=position;h++)
		{
			sum=sum+numCourse[h];
		}
		sum=sum - numCourse[position];
		cout<<"Student's name   : "<<namePtr[position]<<endl;
		cout<<"Faculty : "<<facPtr[position]<<endl;
		cout<<endl;
		cout<<"Course(s) : \n";
		for(int j=sum;j<numCourse[position]+sum;j++)
		{	
		cout<<subPtr.erase(subPtr.begin()+j)<<endl;
		cout<<"Deleted : "<<subPtr[j];
		}
	}
}

[ne555]

What problem are you having?

namePtr.erase(namePtr.begin()+position);
cout<<"Deleted : "<<namePtr[position]; //you just erase it, what do you expect? 

find(namePtr.begin(), namePtr.end(), target) - namePtr.begin() This will give you the position

[miaOnDeLine]

I couldn't compile the whole program as it give me

no match for "the operator<<" in std:: cout << <<<std:: vector<std:string,std::allocator<std:: string> .... etc

for this line

error: cout<<subPtr.erase(it)<<endl; // i modify my code a little to this. before this is
                                   //cout<<subPtr.erase(subPtr.begin()+j)<<endl; 

[ne555]

What do you want to do?
subPtr.erase(it) returns an iterator, possibly invalid (end). What do you want to print?

[miaOnDeLine]

I want to erase the element of a string but my console won't compile because there is an error.

[Zhuge]

Then why are you trying to [code]cout<<[/cout] it?

[Lubi]

you should echo before whatever you want to print
then I guess it will wok
ok
Regards
Lubi

[Lubi]

any one have idea about how to analyse memory of a software using C++ , or is there any algorithm to analyse memory
plz plz do help me
Regards
Lubi

[coder777]

save the data (string in this case) before you erase it and then print it out. Like

        const string deleted_name = namePtr[position];
        namePtr.erase(namePtr.begin()+position);
        cout<<"Deleted : "<<deleted_name;

or just print it before you erase it

        cout<<"Deleted : "<<namePtr[position];
        namePtr.erase(namePtr.begin()+position);