以下程序段共有错误()处。include using namespaces std;class Sample{private:int n;

以下程序段共有错误( )处。 #include ＜iostream＞ using namespaces std; class Sample { private: int n; public: Sample (int i) { n=i; } void setvalue(int i) { n=i; } void display() { cout＜＜"n="＜＜n＜＜endl ; } }; int main() { const Sample a(10); a.setvalue (5); a.display(); return 0; }

A．1

B．2

C．3

D．4

[单选题]若有以下程序:include using namespaces std;class A{public: A (){} A (int i) {x1=若有以下程序： #include ＜iostream＞ using namespaces std; class A { public: A (){} A (int i) { x1=i; } void dispa() { cout＜＜"xl="＜＜xl＜＜" , "; } private: int x1; }; class B : public

[单选题]若有以下程序:include using namespaces std;class A {public: A(){} A(int i) {x1=i若有以下程序： #include ＜iostream＞ using namespaces std; class A { public: A(){} A(int i) { x1=i; } void dispa() { cout＜＜'x1="＜＜x1＜＜","; } private: int x1; }; class B: public A { p

[单选题]若有如下程序:include using namespaces std;int s=0;class sample {static iht n;pu若有如下程序： #include ＜iostream＞ using namespaces std; int s=0; class sample { static iht n; public: sample(int i) { n=i; } static void add() { s+=n; } }; int sample::s=0; int main()

[单选题]有以下程序include include using namespace std;class base{private:char有以下程序 #include ＜iostream＞ #include ＜string＞ using namespace std; class base { private: char baseName[10]; public: base () { strcpy(baseName,"Base"); } virtual char *myName() { return b

[单选题]有以下程序:include using namespace std;int s=0;class sample{ static int n;publi有以下程序: #include ＜iostream＞ using namespace std; int s=0; class sample { static int n; public: sample (int i) { n=i; } static void add() { s+=n; } }; int sample::n=0;A．2B．5C．7D．

[试题]若有以下程序段: include using namespace std; int main() {char*p="abcdefgh",*r;l若有以下程序段：include ＜iostream＞using namespace std;int main(){char*p="abcdefgh",*r;long*q;q=(long*)p;q++;r=(char*)q;cout＜＜r＜＜end1;return 0;}该程序的输出结果是[ ]。

[单选题]有如下程序include include using namespace std;class MyClass {public:M有如下程序#include ＜iostream＞#include ＜iomanip＞using namespace std; class MyClass {public:MyClass(){ cout＜＜'A'; }MyClass(char c){ cout＜＜c; }～MyClass(){ cout＜＜'B'; }};int main() {MyClass p

[单选题]有如下程序include include using namespace std;int main( ){cout<

[单选题]有以下程序:include include using namespace std;int main ( ){ char b1[8有以下程序： #include ＜iostream＞ #include ＜string＞ using namespace std; int main ( ) { char b1[8] = "abcdefg"; char b2[8],*pb=b1+3; while (--pb＞=b1) strcpy (b2, Pb) ; cout＜＜strlen (b2) ＜＜en

[单选题]有以下程序:include include using namespace std;class point{private: doub有以下程序： #include ＜iostream＞ #include ＜math＞ using namespace std; class point { private: double x; double y; public: point(double a,double b) { x=a; y=b; } friend double distance(point