C++ Program to Input Marks of 6 Subjects from 20 Students and Calculate the Sum and Average Marks of all the Students using Struct

This is the simple C++ console program for beginners to compute the result of a Class. The program take take of the student, the marks in each subject and then compute the overall marks of the student and then calculate the average.You can change formula of calculation as per requirement.

Source Code

# include <iostream>
#include <stdlib.h>
#include <fstream>
using namespace std;
/*
 *  uzair
 */
//Structure
struct student
{
 char name[20];
 int grade[6];
};

//Struct Instance
student stdInstance[50];


//Globel variables
int i=0;
int size=0;

// Function Declearation
int student_menu();
void add_student();

// Main
int main()
{
 cout<<"\a\n\n\n"
  <<"\t*******************************************************"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**                   Welcome To                      **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**        Student ARRAY and STRUCTURES Demo          **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t*******************************************************"<<endl
  <<endl
  <<endl;
 cout<<"\t\t\t";
 student_menu();
 
 return 0;
}//end main
int student_menu()
{
  system ("color 0F");
 char student_menu_choice[5];
 cout<<endl<<endl
  <<endl<<endl<<endl
  <<"\a\t  *******************************************************"<<endl
  <<"\t  **                                                   **"<<endl
  <<"\t  **                   You Are In                      **"<<endl
  <<"\t  **                                                   **"<<endl
  <<"\t  **                   Student Menu                    **"<<endl
  <<"\t  **                                                   **"<<endl
  <<"\t  *******************************************************"<<endl
  <<endl;
 loop_of_student_menu:
 
  cout<<"\t\t  What do you want to do for student  "      <<endl
   <<"\t\t  ==================================="      <<endl
   <<endl
   <<     "\n\n\t 1  =>  Add student  "
   <<     "\n\n\t 2  =>  Student menu Exit \n"
   <<         "\t===     ------------------ "<<endl
   <<"\t\t\t\tYou Select : ";

   cin >> student_menu_choice;

   i = atoi (student_menu_choice);
   if (i>0)
   {
    switch (i)
    {
    case 1:
     {
      add_student();//Function
      break ;
     }
    case 2:
     {
      return 0;
     }break ;
    default :
     {
      return 0;
     }break ;
    }//end switch
   }//end if
   else
   {
    system("CLS");
     
   }//end else
   return 0;
}

void add_student()
{
 system ("color F0");
 system("CLS");
  cout<<endl<<endl<<endl
  <<endl<<endl<<endl
  <<"\a\t  *******************************************************"<<endl
  <<"\t  **                                                   **"<<endl
  <<"\t  **                  Adding Student                   **"<<endl
  <<"\t  **                                                   **"<<endl
  <<"\t  *******************************************************"<<endl;
 
 cout<<endl
  <<"\t\tCOLLECTING DATA FOR EMPLOYEE NO : "<<size
  <<endl
  <<    "\n\tEnter name terminating at \".\" : ";

 cin.getline(stdInstance[size].name,20,'.');//taking name

 for(int i=0;i<6;i++){
  cout<<    "\n\tEnter Score For course # "<<i+1<<" : ";
  cin>>stdInstance[size].grade[i];

 }
 
 cout<<endl           
  <<"Student added with following data"          <<endl
  <<endl
  <<"Name : "<<stdInstance[size].name    <<endl;
 int sum=0, average=0;
 
 for(int j=0;j<6;j++){
  cout<<    "\n\tScore For course # "<<j+1<<" : "<<stdInstance[size].grade[j];
  if(stdInstance[size].grade[j]<50){
   cout<<    "\n\tGrade is : F ";
  }else{
   cout<<    "\n\tGrade is : Not F ";
  }
  sum = sum + stdInstance[size].grade[j];
 }
 cout<<"\n\n\tSum For courses : "<<sum;
 average=sum/6;
 cout<<"\n\n\tAverage For courses : "<<average ;
 if(average<50){
  cout<<    "\n\n\tNot Promoted ";
 }else{
  cout<<    "\n\n\tPromoted";
 }
 size++;
}

Output of the Program

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Asad Niazi is Software Engineer , Programmer, Web Developer and a young mentor of BloggersTown and PProgramming. Asad Love to writes about Technology, Programming, Blogging and make money online.