Student Grading System In C++

#include<iostream.h>
#include<string>

using namespace std;

void Student_Info();
void CourseMark();
float CourseGrade(float);
void Display_GradeRport();
void Culculate_CGPA();
void Status(float);

struct student
{
int ID,age,year,semester;
char fname[15];
char lname[15];
char sex;
float CGPA;
struct 
{
float prog1;
float Int_CS;
float prog2;
float comEng;
}course;

struct 
{
float prog1g;
float Intg;
float prog2g;
float comeg;
}grade;

};
struct student s[100];

int n;
int main()
{
cout<<"====================================================\n";

cout<<"Student Grade Report system.Using C++\n";
cout<<"Programmed by: R.N.Patel\n\n";
cout<<"MCA-M.Tech (CSE)\n";
cout<<"LPU\n\n";
cout<<"Welcome To Student Grade Report:\n";

cout<<"====================================================\n";

Student_Info();

CourseMark();

Culculate_CGPA();

Display_GradeRport();

}

void Student_Info()
{
int i;
cout<<"How many Student you have lessthan 100:";
cin>>n;
cout<<"\nStudent Information:\n";

for(i=0;i<n;i++)
{
cout<<"Enter student_"<<i+1<<" First name:\n";
cin>>s[i].fname;
cout<<"Enter student_"<<i+1<<" Last name:\n";
cin>>s[i].lname;
cout<<"Enter student_"<<i+1<<" ID number:\n";
cin>>s[i].ID;
cout<<"Enter student_"<<i+1<<" Sex:\n";
cin>>s[i].sex;
cout<<"Enter student_"<<i+1<<" Age:\n";
cin>>s[i].age;
cout<<"Enter student_"<<i+1<<" Year:\n";
cin>>s[i].year;
cout<<"Enter student_"<<i+1<<" Semester:\n";
cin>>s[i].semester;


}

}
void CourseMark()
{
int mark;

cout<<"Enter Students mark to corresponding course:\n";
for(int i=0;i<n;i++)
{
cout<<"Enter student_"<<i+1<<" programming mark:\n";
cin>>s[i].course.prog1;


cout<<"Enter student_"<<i+1<<" Introduction to CS:\n";
cin>>s[i].course.Int_CS;



cout<<"Enter student_"<<i+1<<" Programming II:\n";
cin>>s[i].course.prog2;


cout<<"Enter student_"<<i+1<<" Communicative English:\n";
cin>>s[i].course.comEng;


}
}
float CourseGrade(float mark)
{
float result;  

if(mark<=100 && mark>90)
{
result=4.0;
cout<<"A+\n";
}
else if(mark<=90 && mark>85)
{
result=4;
cout<<"A\n";
}
else if(mark<=85 && mark>80)
{
result=3.75;
cout<<"A-\n";
}
else if(mark<=80 && mark>75)
{
result=3.5;
cout<<"B+\n";
}
else if(mark<=75 && mark>70)
{
result=3;
cout<<"B\n";
}
else if(mark<=70 && mark>65)
{
result=2.75;
cout<<"B-\n";
}
else if(mark<=65 && mark>60)
{
result=2.5;
cout<<"C+\n";
}
else if(mark<=60 && mark>50)
{
result=2;
cout<<"C\n";
}
else if(mark<=50 && mark>45)
{
result=1.75;
cout<<"C-\n";
}
else if(mark<=45 && mark>40)
{
result=1.5;
cout<<"D+\n";
}
else if(mark<=40 && mark>30)
{
result=1;
cout<<"D\n";
}
else if(mark<=30 && mark>0)
{
result=0;
cout<<"F\n";
}
else
{
cout<<"mark out of range.\n";
}

return result;

}


void Culculate_CGPA()
{

int credit=5;//credit hour of each course
int Tcredit=20;//total credit hour
int a;
float SumofGP[2]={0};

for(a=0;a<n;a++)
{

if((s[a].grade.prog1g !=0 && s[a].grade.Intg !=0) && (s[a].grade.comeg !=0  && s[a].grade.prog2g !=0))
{
SumofGP[a]=(s[a].grade.prog1g * credit) + (s[a].grade.Intg * credit) + (s[a].grade.comeg * credit) + (s[a].grade.prog2g*credit);
}
else if(s[a].grade.prog1g ==0)
{
SumofGP[a]= (s[a].grade.Intg * credit) + (s[a].grade.comeg * credit) + (s[a].grade.prog2g*credit);
}
else if(s[a].grade.Intg ==0)
{
SumofGP[a]=(s[a].grade.prog1g * credit) + (s[a].grade.comeg * credit) + (s[a].grade.prog2g*credit);   
}
else if(s[a].grade.prog2g ==0)
{
SumofGP[a]=(s[a].grade.prog1g * credit) + (s[a].grade.Intg * credit) + (s[a].grade.comeg * credit);
}
else
{
SumofGP[a]=(s[a].grade.prog1g * credit) + (s[a].grade.Intg * credit) + (s[a].grade.prog2g*credit);
}
s[a].CGPA=SumofGP[a]/Tcredit;
}

}


void Display_GradeRport()
{
int i,j;
float alpha;
cout<<"Student Grade Report:\n";
cout<<"================================================================\n";
for(i=0;i<n;i++)
{
cout<<"Full Name: "<<s[i].fname<<"\t"<<s[i].lname<<"\t"<<"Year:"<<s[i].year<<"\tSemester: "<<s[i].semester<<endl;
cout<<"Sex: "<<s[i].sex<<"\t"<<"Age: "<<s[i].age<<endl<<endl;

for(j=0;j<4;j++)
{
if(j==0)
{
alpha=s[i].grade.prog1g;
cout<<"Programming I:       \t";
s[i].grade.prog1g=CourseGrade(s[i].course.prog1);
}
else if(j==1)
{
alpha=s[i].grade.Intg;
cout<<"Introduction to CS:   \t";
s[i].grade.Intg=CourseGrade(s[i].course.Int_CS);

}
else if(j==2)
{
alpha=s[i].grade.prog2g;
cout<<"Programming II:      \t";
s[i].grade.prog2g=CourseGrade(s[i].course.prog2);
}
else
{
alpha=s[i].grade.comeg;
cout<<"Communicative English:\t";
s[i].grade.comeg=CourseGrade(s[i].course.comEng);
}

}

Culculate_CGPA();

cout<<"CGPA="<<s[i].CGPA<<endl;;

Status(s[i].CGPA);

cout<<"==============================================================\n";

}
}
void Status(float sta)
{
if(sta==4)
{
cout<<"Status: Very great distinction.\n";
}
else if(sta>=3.75 && sta<=3.99)
{
cout<<"Status: Grate distinction.\n";
}
else if(sta>3.5 && sta<=3.74)
{
cout<<"Status: Distinction.\n";
}
else if(sta>3.49 && sta<=3.25)
{
cout<<"Status: dean's list.\n";
}
else if(sta>=2.0 && sta<=3.24)
{
cout<<"Status: Promoted.\n";
}
else if(sta>1.75 && sta<=1.99)
{
cout<<"Status: Warning.\n";
}
else if(sta>1.00 && sta<=1.74)
{
cout<<"Status: Readmission.\n";
}
else if(sta>0.0 && sta<1.0)
{
cout<<"Status: Distinction.\n";
}

}