在c++中是不允许数组作为函数的返回值的 int [] someFunction( ); //ILLEGAL 要想实现函数返回一个数组，那返回对应数组里面类型的指针you must return a pointer to the array base type and have the pointer point to the array. So, the function declaration would be as follows:  int* someFunction( ); //Legalint* doubler( int a[], int size){int* temp = new int[size];for ( int i =0; i < size; i++) temp[i] = 2*a[i]; return temp; }调用int a[] = {1, 2, 3, 4, 5};int* b;b = doubler(a, 5);delete[] b