int main() { int n = 3; array double a[n][n]; a = identitymatrix(n); printf("identitymatrix(n) =\n%f\n", a); }

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identitymatrix(n) = 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000