Matrix Row sum , column sum and traspose

A program to enter a matrix and find the following menu items:
1 transpose
2 row sum
3 column sum
4 exit
(using switch statement also use Goto Statement)

#include<stdio.h>
#include<stdio.h>
#include<conio.h>
#include<process.h>
int main()
{
 int a[10][10],i,p,j,k,m,n;
 top:
 printf("choose the menu :\n 1) transpose the matrix\n 2) add row \n 3) Add column \n 4) Exit\n Choose the menu item");
 scanf("%d",&p);
  printf("Enter the matrix size m*n:");
 scanf("%d%d",&m,&n);
 for(i=0;i<m;i++)
 {
  for(j=0;j<n;j++)
  {
  printf("Enter ar[%d][%d] value:",i+1,j+1);
  scanf("%d",&a[i][j]);
  }
 }
  for(i=0;i<m;i++)
 {
  for(j=0;j<n;j++)
  {
  printf("%d\t",a[i][j]);
  }
  printf("\n");
 }
 switch(p)
  {
   case 1:
    printf("Transpose is :\n");
  for(j=0;j<n;j++)
 {
  for(i=0;i<m;i++)
  {
   printf("%d\t",a[i][j]);
  }
  printf("\n");
 }
 break;
 case 2:
  printf("row sum\n");
 for(i=0;i<m;i++)
 {
 int sum =0;
  for(j=0;j<n;j++)
  {
   sum= sum+a[i][j];
  }
  printf("the sum of %d row is %d\t",i+1,sum);
  printf("\n");
 } 
 break;
 case 3:
  printf("column sum:\n");
 for(j=0;j<n;j++)
 {
  int sum = 0;
  for(i=0;i<m;i++)
  {
   sum= sum+a[i][j];
  }
  printf("the sum of %d column is %d\t",j+1,sum);
  printf("\n");
 }  
 break;
 case 4:
 exit(0);
  
 default:
 printf("input error");
 break;
}
 if(p!=4)
 goto top;
 getch();
 
}

OUTPUT: