Following is the source code of a simple C++ program. It contains a user-defined function demoFunction(). #include using namespace std; void demoFunction(void) { int a; cout<<"Please enter an integer:"<>a; } int main() { int a; cout<<"Please enter an integer:"<>a; demoFunction(); return 0; } If a user runs this program, how many time is the user asked to enter an integer? The integer or integers the user enters is or are save i cell or in different memory cell twice, the same memory cell once, different memory cells once, the same memory cell twice, different memory cells