Conversion in types error (class involved)

[Kauto]

So I get errors like:

Error 1 error C2440: 'initializing' : cannot convert from 'const char [4]' to 'Course'
Error 2 error C2440: 'initializing' : cannot convert from 'int' to 'Course' 158
Error 3 error C2440: 'initializing' : cannot convert from 'const char [6]' to 'Course' 158
Error 4 error C2078: too many initializers 158
I dont know what to really do with it, any help on how to fix this would be great.

# include <iostream>
# include <cstring>
#include <iomanip>
#include <cmath>
using namespace std;


class Course                                               // Creating the class Course
{
public:
char CourseName[10];                                       // Array of size 10, 9 characters and 1 null terminator
int StudentNumber;                                         // Number of students enrolled in the class
double Grade[30];                                          //Grade Array of size 30, the maximum number of students that can be in the class
double Average;


Course ()
{CourseName[0]='\0';
StudentNumber=8;
for(int i=0; i<StudentNumber;i++)  
	Grade[i]=0.0;
	
	Average=0.0;


;}
Course(char CName[],int SNumber)                           //Counstructor: CNAME for Course Name and SNumber for Student Number

{
	setCourseName (CName);                                 // Function setCourseName takes as argument the array CName
	setStudentNumber (SNumber);                            // Function setStudentNumber takes as argument the integer value of SNumber provided in the main function
	
	for(int i=0; i<StudentNumber;i++)                                 // Initializing the whole array to 0.0 (double)
		Grade[i]=0.0;
	
	Average=0.0;                                           // Defaulting average to 0.0 (double)

}


void setCourseName(char CName[])
{   CourseName[0]='\0';
	strncpy_s(CourseName,CName,9);
	CourseName[9]='\0';

}

void setStudentNumber (int SNumber)                        //Function definition
{
    StudentNumber=(SNumber<8 || SNumber>30?8:SNumber);     // Using the conditional terminator to set the StudentNumber value to 8 if the conditions were true, and to take the value provided if false
}         

char* getCourseName (void)

{
	return CourseName;
}

int getNumberStudent (void)
{
return StudentNumber;
}

double getAverage (void)
{
return Average;
}

void GradeFiller (void)       // SNumber is the number of students in the class=number of grades
{ int i=0;                                                 // Initializing i to 0 to use it in the While loop
	while (i<StudentNumber)                                      // SNumber would change if we ever change the value through the program, making the change easier to apply
	{
		Grade[i]=rand()%101;                               // Rand will provide numbers between 0 and 100 in each cell of the array
		i++;
}
}

void GradeChanger(int k, double grade)
{
	int main; 

	if(k>=0 && k<=29)
		main=k;
	else main=0;

Grade[main]=grade;
}

double AverageCalculator (void)
{
	double sum=0.0;

	for(int i=0;i<StudentNumber;i++)
		sum=Grade[i]+sum;

	static_cast<double> (Average)=sum/StudentNumber;

}

double StandardDeviation (void)
{
	double StdDvtn;
	
	double top=0.0;

	for (int i=0;i<StudentNumber;i++)
	top= top +pow((Grade[i]-Average),2)	;
	

	StdDvtn= sqrt(top/(StudentNumber-1))
	
	
	
	
	;}




int GradeChecker ()             // Takes as arguments the array Grade and the number of student SNumber
{
	int counter=0; 
for (int i=0;i<StudentNumber;i++)
{
	if (Grade[i]>75)                                       // Checking each grade's value if it is > then 75 to incrememnt the counter if true
counter++;

return counter;                                            // The counter is the number of grades above 75

}
}

void printClass (int SNumber, double Grade[])
{
cout<<"Name of the course: "<<CourseName<<endl;
cout<<"Number of Students: "<<StudentNumber<<endl;
cout<<"The Grades of the students are: ";
for (int i=0;i<SNumber;i++)
{
cout<<Grade[i]<<endl;
}
cout<<"The average of the class is: "<<Average;
cout<<"The standart deviation is: "<<StandardDeviation();

}


};






 void main ()
 {

	 Course Class[3]={"Bio",13,"Chimo",23,"Phisio",22};
	 
	 Course a1;

	 for (int i=0;i<3;i++)
	 {
	 Class[i].setCourseName("Hello");
	 Class[i].setStudentNumber(10);
	 Class[i].GradeFiller();
     }
	
	 Course *Ptr=Class;

	 //By using a pointer I need to print on the screen info about the 2nd  and 3rd (using the arrow and the dot operator)
	 //I got a little lost in this part
	 //
	 //
	 //


	 cout<<"The Average of class 1 is: "<<Ptr->AverageCalculator();
	 cout<<"The Average of class 2 is: "<<(Ptr+1)->AverageCalculator();
	 cout<<"The Average of class 3 is: "<<(Ptr+2)->AverageCalculator();

	 cout<<"The Std Deviation for the class 3 is: "<<(Ptr+2)->StandardDeviation();

	a1.Grade[23]=30;


	cout<<"The Course Name of class 1 is : "<<Ptr->getCourseName();
	cout<<"Number of students in class 1 is : "<< Ptr->getNumberStudent();


	cout<<"Number of grades >75: "<<Ptr->GradeChecker();

	 }

And in the /// part I also need to use the dot operator and the arrow operator to print on the screen info about the second and third Courses. Help on this is much appreciated as well.

Regards

[nvrmnd]

@line 96 : static_cast<double> (Average)=sum/StudentNumber;
that doesn't make sense, you are trying to assign an lvalue to an rvalue or a temporary variable
maybe you meant return (static_cast<double> (sum/StudentNumber)); ?

sum=Grade[i]+sum; can be simplified to sum += Grade[i];

main() must return int

@main
Course Class[3]={"Bio",13,"Chimo",23,"Phisio",22};
You should make it :

Course Class[3] = {
  {"Bio", 13, 0.0, 0.0 }, { "Chimio", 23, 0.0, 0.0 }, { "Phisio", 22, 0.0  }
};

and also the data members should be private since they already have acessors/mutators

and try to add -Wall in ur compiler flag and u will see some other additional warnings

[Kauto]

Thank you very much it fixed everything but the part in main in line 158.
Its giving me an error C2552: non aggregates can be initialized with initializer list.

Its some problem with the {} thing, i just cant tell which ones to use.
Here's my code again.

# include <iostream>
# include <cstring>
#include <iomanip>
#include <cmath>
using namespace std;


class Course                                               // Creating the class Course
{private:
public:
char CourseName[10];                                       // Array of size 10, 9 characters and 1 null terminator
int StudentNumber;                                         // Number of students enrolled in the class
double Grade[30];                                          //Grade Array of size 30, the maximum number of students that can be in the class
double Average;



Course ()
{                                                          //Default constructor
	CourseName[0]='\0';
StudentNumber=8;
for(int i=0; i<StudentNumber;i++)  
	Grade[i]=0.0;
	
	Average=0.0;


;}
Course(char CName[],int SNumber)                           //Counstructor: CNAME for Course Name and SNumber for Student Number

{
	setCourseName (CName);                                 // Function setCourseName takes as argument the array CName
	setStudentNumber (SNumber);                            // Function setStudentNumber takes as argument the integer value of SNumber provided in the main function
	
	for(int i=0; i<StudentNumber;i++)                                 // Initializing the whole array to 0.0 (double)
		Grade[i]=0.0;
	
	Average=0.0;                                           // Defaulting average to 0.0 (double)

}


void setCourseName(char CName[])                           //Function setCourseName takes an argument of type array of chars
{   CourseName[0]='\0';                                    //Defaulting the string to empty
	strncpy_s(CourseName,CName,9);                         //Copying from the tring provides to the data member CourseName[]. Only 9 characters
	CourseName[9]='\0';                                    //Putting the null terminator in the 10 case of the string

}

void setStudentNumber (int SNumber)                        //Function definition
{
    StudentNumber=(SNumber<8 || SNumber>30?8:SNumber);     // Using the conditional terminator to set the StudentNumber value to 8 if the conditions were true, and to take the value provided if false
}         

char* getCourseName (void)                                 //Return type is a pointer to an array, (to be able to point to the whole string)

{
	return CourseName;
}

int getNumberStudent (void)                                //Returns StudentNumber and takes no argument
{
return StudentNumber;
}

double getAverage (void)                                   //Returns a double value of Average and takes no argument
{
return Average;
}

void GradeFiller (void)                                    // SNumber is the number of students in the class=number of grades
{ 
	int i=0;                                               // Initializing i to 0 to use it in the While loop
	while (i<StudentNumber)                                // StudentNumber would change if we ever change the value through the program, making the change easier to apply
	
	{
		Grade[i]=rand()%101;                               // Rand will provide numbers between 0 and 100 in each cell of the array
		i++;
}
}

void GradeChanger(int k, double grade)                     // k is the index and grade is the grade provided
{
	int main;                                              // main will take the value of k
	double note;                                           // note will take the value of grade

	if(k>=0 && k<=29)                                      //Checking for the validity of the index
		main=k;
	else main=0;

	note=(grade>=0 && grade<=100?k:0.0);                   //Checking for the validity of the grade

Grade[main]=note;
}

double AverageCalculator (void)
{
	double sum=0.0;                                        // Creating a variable sum and assigning 0.0 (double) to it

	for(int i=0;i<StudentNumber;i++)
		sum+=Grade[i];                                     // Calculating the value of sum

return	(static_cast<double> (Average)=sum/StudentNumber); // returning the value of Average being double

}

double StandardDeviation (void)
{
	
	double StdDvtn;                                        // The formula being too complex to calculate, I separated it into many pieces.
	
	double top=0.0;                                        // The top represents the Numerator of the function under the Square Root

	if (Average>=0 && Average <=100)                       // Checking for Average calculation
	{
	for (int i=0;i<StudentNumber;i++)                      // for loop, to induce a loop to make the program run over again incrementing i by 1, and thus getting the value of top
	top= top +pow((Grade[i]-Average),2)	;
	

	StdDvtn= sqrt(top/(StudentNumber-1));
	
	return StdDvtn;
	}

	else return 0;
	}

int GradeChecker (void)             // Doesnt take any argument, as it is a member function it has direct access to the data members
{
	int counter=0; 
for (int i=0;i<StudentNumber;i++)
{
	if (Grade[i]>75)                                       // Checking each grade's value if it is > then 75 to incrememnt the counter if true
counter++;

return counter;                                            // The counter is the number of grades above 75

}
}

void printClass (void)
{
cout<<"Name of the course: "<<CourseName<<endl;
cout<<"Number of Students: "<<StudentNumber<<endl;
cout<<"The Grades of the students are: "<<endl;
for (int i=0;i<StudentNumber;i++)
{
cout<<Grade[i]<<endl;
}
cout<<"The average of the class is: "<<Average;
cout<<"The standart deviation is: "<<StandardDeviation();

}


};






 int main ()
 {

	Course Class[3] = {
		{"Bio", 13, 0.0, 0.0 }, { "Chimio", 23, 0.0, 0.0 }, { "Phisio", 22, 0.0,0.0  }
	};
	 
	 Course a1;

	 for (int i=0;i<3;i++)
	 {
	 Class[i].setCourseName("Hello");
	 Class[i].setStudentNumber(10);
	 Class[i].GradeFiller();
     }
	
	 Course *Ptr=Class;

	 cout<<"Informations about the 2nd course: "<<endl;
	 (Ptr+1)->printClass();
	 cout<<"Informations about the 3rd course: "<<endl;
	 (Ptr+2)->printClass();


	 cout<<"The Average of class 1 is: "<<Ptr->AverageCalculator();
	 cout<<"The Average of class 2 is: "<<(Ptr+1)->AverageCalculator();
	 cout<<"The Average of class 3 is: "<<(Ptr+2)->AverageCalculator();

	 cout<<"The Std Deviation for the class 3 is: "<<(Ptr+2)->StandardDeviation();

	a1.Grade[23]=30;                 


	cout<<"The Course Name of class 1 is : "<<Ptr->getCourseName();
	cout<<"Number of students in class 1 is : "<< Ptr->getNumberStudent();


	cout<<"Number of grades >75: "<<Ptr->GradeChecker();

	return 0;                                              // Indicates the end of the program
 
 }
	 

Regards.

[nvrmnd]

make a constructor that accepts those 4 arguments, namely courseName, studentNumber, Grade, Average

EDIT oh !, u can also remove the last 2 arguments in ur initializers so that Course::Course( char*, int ) is called

Course Class[3] = {
		{"Bio", 13 }, { "Chimio", 23 }, { "Phisio", 22 }
	};