Function demo_setDiagMatr

examples/isolated/initialising_matrices.cpp:299–333

void demo_setDiagMatr() {

    // inline literal (C++ only)
    DiagMatr a = createDiagMatr(1);
    setDiagMatr(a, {6_i,5_i});
    reportDiagMatr(a);
    destroyDiagMatr(a);

    // vector (C++ only)
    vector<qcomp> vec {11, 22, 33, 44};
    DiagMatr b = createDiagMatr(2);
    setDiagMatr(b, vec);
    reportDiagMatr(b);
    destroyDiagMatr(b);

    // compile-time array
    qcomp arr[4] = {7_i, 8_i, 8, 7};
    DiagMatr c = createDiagMatr(2);
    setDiagMatr(c, arr);
    reportDiagMatr(c);
    destroyDiagMatr(c);

    // heap pointer
    int dim = 8;
    qcomp* ptr = (qcomp*) malloc(dim * sizeof *ptr);
    for (int i=0; i<dim; i++)
        ptr[i] = -i*.5_i;
    DiagMatr d = createDiagMatr(3);
    setDiagMatr(d, ptr);
    reportDiagMatr(d);
    destroyDiagMatr(d);

    // cleanup
    free(ptr);
}


void demo_syncDiagMatr() {