calculate grades and cgpa

#include<iostream.h>
#include<conio.h>
void calavg( int [6][3]);
char calgrade(int);
double calgpa(int);

void calavg(int a[][3])
{
  int avg,i,j;
for( i=0;i<=2;i++)
{
  avg=0;
 for( j=0;j<5;j++)
 avg=avg+a[j][i];
 avg=avg/j;
 a[5][i]=avg;

}

}

char calgrade(int stdmarks)
{
  char g;
 if(stdmarks>0 && stdmarks<50)
   
   g='F';

else if(stdmarks>=50 && stdmarks<60)
   
 g='D';

else if(stdmarks>=60 && stdmarks<70)
    
g='C';

else if(stdmarks>=70 && stdmarks<80)
  
  g='B';

else if(stdmarks>=80 && stdmarks<=100)
  
  g='A';


return g;

}

double calgpa(int stdmarks)

{
  double g;
 if(stdmarks>0 && stdmarks<50)
 g=0;
else if(stdmarks>=50 && stdmarks<60)
  g=1;
else if(stdmarks>=60 && stdmarks<70)
  g=2;
else if(stdmarks>=70 && stdmarks<80)
  g=3;
else if(stdmarks>=80 && stdmarks<=100)
  g=4;
return g;
}
int strcmp(char s1[],char s2[])
{
   //    int size=0;
 //    for(size=0;s1[size]!='\0';size++);
    for(int i=0;s1[i]!='\0';i++)
    {
        if(s1[i]==s2[i])
        {}
        else
        {
            return s1[i]-s2[i];
        }
    }
        return 0;
}
main()
{
clrscr();
int a[6][3],temp;
char name[5][20];
char grade[5][2];
int g[2];
char id[20];
int d;
//int id;
//this is for cgpa:array

double cgpa[5];
int opt,i,j,sum,avg,v=0,gpa;
//this is for float:
double sum1;
for(i=0;i<5;i++)
{
cout<<"Enter the name of std"<<i+1<<": ";
cin>>name[i];
}
v:
cout<<"press 1 to enter marks for pf and 2 for itc : ";
cin>>opt;
if(opt==1)
{
 cout<<"pf\n";
 for( i=0;i<5;i++)
  {

    for( j=0;j<=0;j++)
     {
     cout<<"enter marks "<<name[i]<<" : ";
   cin>>a[i][j];
   }
  }
v++;
if(v<2)goto v;
}

if(opt==2)
{
 cout<<"itc\n";
 for( i=0;i<5;i++)
  {

    for(j=1;j<=1;j++)
     {
     cout<<"enter marks:";
   cin>>a[i][j];
   }
  }
v++;
if(v<2)goto v;
}

for(i=0;i<5;i++)
{
  sum=0;
 for(j=0;j<2;j++)
  {
   sum=sum+a[i][j];
   a[i][2]=sum;
  }

}
//without fun cal avg method:
/*for(i=0;i<=2;i++)
{
  avg=0;
  for(j=0;j<5;j++)

  avg=avg+a[j][i];
  avg=avg/j;
 a[5][i]=avg;

}*/

calavg(a);

cout<<"marks sheet:\n";
cout<<"name\tpf\titc\tsum\n";

for( i=0;i<=5;i++)
{

if(i<5)
cout<<name[i]<<"\t";
 else
cout<<"----------------------------------------\navg:\t";
 for( j=0;j<=2;j++)

 cout<<a[i][j]<<"\t";
  cout<<"\n";


}
cout<<"Grade Sheet:\n";

// this for cgpa cal chek kar:yahan say baqie thk hai:
for(i=0;i<5;i++)
 {
 sum1=0;
 for(j=0;j<2;j++)
{
sum1=sum1+calgpa(a[i][j]);

}
sum1=sum1/j;
cgpa[i]=sum1;
}

cout<<"name\tpf\titc\tcgpa\n";
for(i=0;i<5;i++)
{

for(j=0;j<2;j++)
 grade[i][j]=calgrade(a[i][j]);

}
for(i=0;i<5;i++)
{
if(i<5)
cout<<name[i]<<"\t";

for(j=0;j<2;j++)
{
cout<<grade[i][j]<<"\t";
}
cout<<cgpa[i];
cout<<"\n";
}
// this for  course avg.gpa:
for(i=0;i<1;i++)
{
 for(j=0;j<2;j++)

g[j]=calgpa(a[5][j]);

}
cout<<"............................\nc.gpa\t";

   for(j=0;j<2;j++)
{
cout<<g[j]<<"\t";
}

// display course statistics:
cout<<"\n\ncourse statistics\n\n";
for(i=0;i<2;i++)
{
 cout<<"\npress 1 for pf statistics and 2 for itc: ";
  cin>>opt;
if(opt==1)
cout<<"\npf avgerege course marks:"<<a[5][0]<<"\n";

if(opt==2)
cout<<"\nitc avgerege course marks:"<<a[5][1]<<"\n";
}
/*
for(i=0;i<5;i++)
{

for(int j=0;j<=0;j++)
{
for(int k=0;k<3;k++)
{

if(a[i][j]<a[i+1][j])

  temp=a[i][j];
  a[i][j]=a[i+1][j];
  a[i+1][j]=temp;
}

}

}
for(i=0;i<3;i++)
{
for(j=0;j<=0;j++)
cout<<a[i][j]<<"\n";
}
 */
// searching portion:
cout<<"\n search for student id for marks,grade and cgpa:\n";
cout<<"Enter the std id:";
cin>>id;
for(i=0;i<5;i++)
{

 /*if(id==name[i])
 {
 break;
  }
   */
if(strcmp(id,name[i])==0)
{
cout<<"mark sheet:\n";
cout<<"name\tpf\titc\n";
cout<<name[i]<<"\t";

for(j=0;j<2;j++)
{

cout<<a[i][j]<<"\t";
}
cout<<"\n";

cout<<"grade sheet:\n";
cout<<"pf\titc\tcgpa\n";
for(j=0;j<2;j++)
{
cout<<grade[i][j]<<"\t";

}
cout<<cgpa[i];
break;
}

}

getch();

}