int a[n][n];
int i, k, l, m, temp;

for (l = 0; l < n; l++) {
 for (i = 0; i < n; i++) {
  for (k = 0; k < n; k++) {
   if (a[i][k] < a[i][k+1]) {
    temp = a[i][k];
    a[i][k] = a[i][k+1];
    a[i][k+1] = temp;
   }
  }
 }
}