templateconst vector&vector::operator-=(const vector&v){    for(int i = 0; i < N; i++)      component[i] -= v[i];    return *this;}  //  subtracting a vector from the current vectortemplateconst vector&vector::operator*=(const T& a){    for(int i = 0; i const vector&vector::operator/=(const T& a){    for(int i = 0; i < N; i++)      component[i] /= a;    return *this;}  //  multiplying the current vector by a scalartemplateconst vector<span class="beginpage"> pagenum="440"><a name="862"></a><a name="IDX-440"></a></span>operator-(const vector&u, const vector&v){  return vector(u) -= v;}  //  vector minus vectortemplateconst vectoroperator*(const vector&u, const T& a){  return vector(u) *= a;}  //  vector times scalartemplateconst vectoroperator*(const T& a, const vector&u){  return vector(u) *= a;}  //  T times vectortemplateconst vectoroperator/(const vector&u, const T& a){  return vector(u) /= a;}  //  vector times scalar

templateconst matrix&matrix::operator*=(const T&a){  for(int i=0; iconst matrix&matrix