DELETION OF ARRAY ELEMENT IN C

#include<stdio.h>
#include<conio.h>
void main()
{
int a[20],i,p,n;
printf("Enter size of array\n");
scanf("%d",&n);
printf("Enter the value in array\n");
for(i=0;i<n;i++)
{
    scanf("%d",&a[i]);
}
printf("The value you entered in array are:\n");
for(i=0;i<n;i++)
{
    printf("%d\n",a[i]);
}
printf("Enter the position of element to delete\n");
scanf("%d",&p);
for(i=p;i<n;i++)
{
a[i-1]=a[i];
}
printf("Array after deletion is:\n");
for(i=0;i<n-1;i++)
{
    printf("%d\n",a[i]);
}
getch();
}

C++ PROGRAM TO FIND SUM OF ROW AND COLUMN IN MATRIX FORM

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
int a[3][3],i,j,c1,c2;
cout<<"Enter 3*3 matrix"<<endl;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
    cin>>a[i][j];
    cout<<"    ";
}
cout<<endl;
}
for(i=0;i<3;i++)
{
    c1=0;
for(j=0;j<3;j++)
{
    cout<<a[i][j]<<"    ";
    c1+=a[i][j];
}
cout<<c1;
cout<<endl;
}
for(i=0;i<3;i++)
{
    c2=0;
for(j=0;j<3;j++)
{
c2+=a[j][i];
}
cout<<c2<<"    ";
}
return 0;
}