Transpose of a square matrix

#include<stdio.h>
#define max 100
void main()
{
int a[max][max],i,j,n;
clrscr();
printf("Enter the size of matrix:");
scanf("%d",&n)
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",&a[i][j]);
}
}
printf("\n\nOriginal matrix: \n\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf(" %d ",a[i][j]);
}
printf("\n");
}
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if(i<j)
{

a[i][j]=a[i][j]+a[j][i];
a[j][i]=a[i][j]-a[j][i];
a[i][j]=a[i][j]-a[j][i];
}

}
}
printf("\nTransposed matrix:\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf(" %d ",a[i][j]);
}
printf("\n");
}
getch();
}