Array Diagonal,Row,Column - Sum

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 //SUM OF BOTH DIAGONALS  
 //Downloaded From www.c4cpp.co.nr  
 //(C)2009.All rights reserved.  
 #include<iostream.h>  
 #include<conio.h>  
 #include<process.h>  
 int sum1(int a[50][50],int r)  
 {  
 int s=0;  
  for(int i=0;i<r;i++)  
  { s=s+a[i][i];}  
  return(s);  
 }  
 int sum2(int a[50][50],int r)  
 {  
 int s=0;  
 int j;  
 j=r-1;  
 for(int i=0;i<r;i++)  
 s=s+a[i][j--];  
 return(s);  
 }  
 void row(int a[50][50],int r)  
 {  
 int s=0;  
 for(int i=0;i<r;i++)  
 {  
 s=0;  
 for(int j=0;j<r;j++)  
 {  
 s=s+a[i][j];  
 }  
 cout<<"Sum of Row "<<i+1<<" = "<<s<<endl;  
 }}  
 void col(int a[50][50],int r)  
 { int s=0;  
 for(int i=0;i<r;i++)  
 {  
 s=0;  
 for(int j=0;j<r;j++)  
 {  
 s=s+a[j][i];  
 }  
 cout<<"Sum of Column "<<i+1<<" = "<<s<<endl;  
 }}  
 void main()  
 {  
 clrscr();  
 int i,s,j,r,c,ch,a[50][50];  
 x:  
 cout<<"Entr Array Limit--(Enter only Row as R=C)"<<endl;  
 cin>>r;  
 cout<<"Enter Array"<<endl;  
  for(i=0;i<r;i++)  
  {  
   for(j=0;j<r;j++)  
   {  
   cin>>a[i][j];  
   }  
  }  
 y:  
 cout<<endl<<endl<<"        Enter Choice :"<<endl<<"Sum of---- 1:main 2:Secondary 3.Rows 4.Columns 5.Re-enter 6.Exit "<<endl;  
 cin>>ch;  
 switch(ch)  
 {  
 case 1:  
 s=sum1(a,r);  
 cout<<"Sum = "<<s<<endl;  
 goto y;  
 case 2 :  
 s=sum2(a,r);  
 cout<<"Sum = "<<s<<endl;  
 goto y;  
 case 3:  
 row(a,r);  
 goto y;  
 case 4:  
 col(a,r);  
 goto y;  
 case 5:  
 goto x;  
 case 6:  
 exit(0);  
 default :  
 cout<<"Wrong Choice"<<endl;  
 break;  
 }  
 getch();  
 }