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I am unsure why I am getting unable to resolve identifier error

djru (30)
I've started a new project where I have to read id numbers and grades from a file, and place information in a array of a struct. I am pretty sure I do not have to declare i and j in my for statements as variables, but netbeans keeps giving me unable to resolve identifier errors for those variables. Any suggestions would help, here's my code so far.
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#include<iostream>
#include<fstream>
#include<iomanip>

const int MAX_ID = 10;      // max number of ids
const int MAX_SCORES = 7;   // max number of scores

using namespace std;

struct grades
    {
        int id[MAX_ID];     //array for id
        int scores[MAX_SCORES]; //array for scores
        float stu_avg;          // student average score
        string grade;           // student grade
    };
    
#define in_grades "grades.txt"  // defining local file grades.txt
//function prototype
void process_ngrades (ifstream&);

int main()
{
    
    ifstream ngrades;           // ngrades input stream
    
    ngrades.open(in_grades);    //open file
    
    //if ifstream doesn't open
    if (ngrades.fail())
    {
        cerr << "*** Cannot Open for input." << endl;
        return EXIT_FAILURE;
    }
    
    process_ngrades (ngrades);
    
}

void process_ngrades (ifstream& ngrades)
{
    int stu_score=0;      //sum of student scores
    int tot_score=0;      //total score for all students
    int tot_count=0;      // count for scores
    float stu_avg;
    string grade;         //grade for student score
    
    
    while (!ngrades.eof())
    {  
        for (i = 0, i < MAX_ID, i++)
        {
                ngrades>> grades.id[i];
        
              for (j=0, j<MAX_SCORES, j++)
                {
            ngrades >> grades.scores[j];
            stu_score += grades.scores;
            tot_count ++
                }
            grades.stu_avg= stu_score / MAX_SCORES;
            tot_score+= stu_score;
            stu_score = 0;        
        }
        
                
   }
        
}
vlad from moscow (6539)
Why are you sure that "you do not have to declare i and j in your for statements as variables"?!
Each name used in a program shall be declared.

So you shall write

for ( int i = 0, i < MAX_ID, i++)
Phil123 (131)
What vlad said, except you need semi-colons

for (int i = 0; i < MAX_ID; i++)
djru (30)
It was late please forgive me hahaha, no data type, or semi-colons, i couldn't figure it out for nothing between my nods.
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