Programming

#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <map>
#include <vector>
#include <cstdlib>

using namespace std;
struct grades {
    string course_Abrrev; 
    int course_Credit; 
    char course_Grade;};

struct IDnName { 
    int student_ID; 
    string student_Name;};

int main(int argc, char *argv[])
{
    vector <struct grades> Courses;
    map < string, vector < grades > >marks;
    map < string, string > names;

 ifstream inFILE;
    inFILE.open(argv[1]);

    if (inFILE.fail()) {
    cout << "ERROR: File failed to open!" << endl;
    } else {
    string line;                //string for one line
    struct IDnName oneName;        // Allocate a place for one ID and name
    struct grades oneCourse;    // Allocate a place for a structure for a record of one course

    while (inFILE.good()) {
        char *sPtr;                //string pointer for token
        char *sArray = new char[line.length() + 1];    //Initialize pointer sArray for string--->char* conversion

        getline(inFILE, line);    //Read the whole line
        strcpy(sArray, line.c_str());
        //tokenize the line into array
        sPtr = strtok(sArray, " ");    
//        oneName.student_ID = atoi(sPtr[0].c_str());   // did not work
        oneName.student_ID = stoi(sPtr);                                //c++ method

        while (sPtr != NULL) {
        oneName.student_Name = sPtr;
        names.insert(make_pair(oneName.student_ID, oneName.student_Name));        //LINE 54
        sPtr = strtok(NULL, " ");
        oneCourse.course_Abrrev = sPtr;
        sPtr = strtok(NULL, " ");
//        oneCourse.course_Credit = atoi(sPtr[0].c_str());  // did not work
        oneCourse.course_Credit = stoi(sPtr);
        sPtr = strtok(NULL, " ");
        oneCourse.course_Grade = sPtr[0];
        }

        if (marks.find(oneName.student_ID) != marks.end()) {                //LINE 65
        marks.insert(make_pair(oneName.student_ID, vector<struct grades>()));        //LINE 66
        } else {
        Courses.push_back(oneCourse);
        }
    }
    }

// print part not ready yet
return 0;
}

struct map_element {
        struct
        {
                string studentid;
        } key;

        struct {
                int studentid;
                string payload;
        } value;
};

pair1 <2333021, Courses(size=3)>
pair2 <2475063, Courses(size=4)>
pair3 <2663628, Courses(size=5)>
......

#include <stdio.h>
#include <string.h>
#include <stdlib.h>     // You need this for atoi, see 'man atoi'

#include <map>
#include <vector>
#include <string>
using namespace std;

struct grades {
    string course_Abrrev;
    int course_Credit;
    char course_Grade;
};

int main(void)
{
        char buf[4096];
        map<int, string> names;
        map<int, vector < grades > > marks;

        // Read a line into 'buf'
        while(fgets(buf, 4096, stdin) != NULL)
        {
                // Array of 10 pointers.
                // Each will point to a position inside 'buf', or
                // just point to "".
                const char *token[10];
                grades grade;
                int n=0;

                token[n]=strtok(buf, " \r\n\t");
                while(n < 10)
                {
                        n++;
                        token[n]=strtok(NULL, " \r\n\t");
                        if(token[n]==NULL) break;
                }
                // Set all NULL strings to "" instead.
                while(n < 10) token[n++]="";

                // There, now we have a nice array of tokens
                // which are all guaranteed not to crash when used.
                // The very worst any of them will be is blank...

                n=atoi(token[0]);       // Get student ID

                grade.course_Abrrev=token[2];
                grade.course_Credit=atoi(token[3]);
                grade.course_Grade=*(token[3]);

                names[n]=token[1];              // Store name
                marks[n].push_back(grade);      // store grade
        }

        for(map<int, string>::iterator i=names.begin();
                i != names.end();
                i++)
        {
                int id=(*i).first;
                printf("%d %s\n", id, (*i).second.c_str());

                for(vector<grades>::iterator n=marks[id].begin();
                        n != marks[id].end();
                        n ++ )
                {
                        printf("\t%s %d %c\n",
                                (*n).course_Abrrev.c_str(),
                                (*n).course_Credit,
                                (*n).course_Grade);
                }

        }
}