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#include <u.h>
#include <libc.h>
#define N 4
typedef double Matrix[N][N];
void
transpose(Matrix a)
{
int i, j;
double tmp;
for(i = 0; i < N; i++)
for(j = i; j < N; j++){
tmp = a[i][j];
a[i][j] = a[j][i];
a[j][i] = tmp;
}
}
void
printm(Matrix m)
{
int i, j;
for(i = 0; i < N; i++){
for(j = 0; j < N; j++)
print("%g ", m[i][j]);
print("\n");
}
print("\n");
}
void
main()
{
Matrix m = {
11, 12, 13, 14,
21, 22, 23, 24,
31, 32, 33, 34,
41, 42, 43, 44,
};
printm(m);
transpose(m);
printm(m);
exits(0);
}
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