#include<stdio.h>
#include<string.h>
float avg(float);
main()
{
      FILE *p[2];
      int k,students=10,subjects=4,i,j,id_number,date_of_birth,fail=0;
      float marks[100],total=0,avg;
      char name[30],course_enrolled[30],filename[10];
      for(i=1;i<=2;i++)
           {
                printf("filename"); 
                scanf("%s",&filename);
                p[i]=fopen(filename,"w");
                printf("Enter Name of Student\n",p[i]);
                fscanf(stdin,"%s",&name,p[i]);
                printf("Enter Course In Which Student Is Enrolled\n",p[i]); 
                fscanf(stdin,"%s",&course_enrolled,p[i]);
                printf("Enter ID Number Of %s Enrolled in Course %s\n",name,course_enrolled,p[i]);
                fscanf(stdin,"%d",&id_number,p[i]);
                printf("Enter Date Of Birth Of %s Enrolled in Course %s and\n ID-Number is %d\n",name,course_enrolled,id_number,p[i]);
                fscanf(stdin,"%d",&date_of_birth,p[i]);
                for(j=1;j<=4;j++)
                     {
                     printf("Enter Marks for Subject %d for Student %s\n",j,name);
                     fscanf(stdin,"%f",&marks[j]);
                     total=total+marks[j];
                     if(marks[j]<50)
                     fail=fail+1;
                     else
                     continue;
                     }                                                                                
                     avg=(total/400)*100;
                     printf("AVERAGE=%f\n",avg);
                     if(avg>=70)
                     printf("Grade A\n");
                     if(avg>=60&avg<70)
                     printf("Grade B\n");
                     else if(avg>=50&avg<60)
                     printf("Grade C\n");
                     else if(avg>=45&avg<50)      
                     printf("Grade D\n");
                     else if(avg>=40&avg<45)
                     printf("Grade E\n");
                     else if(avg<40)
                     printf("Fail\n");
                     if(fail>=2)
                     printf("Student is failed and cann;t promote\n");
                     else
                     continue;
                     fclose (p[i]);                    
                }
           for(k=1;k<=2;k++)
           {
           printf("Input filename"); 
           scanf("%s",&filename);
           p[k]=fopen(filename,"r");
           fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %d\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,avg);
           fclose (p[k]);
           }
           getch();
}