更多"下面程序的输出结果是 #include< stdio.h> #in"的相关试题:
[单项选择]下面程序输出的结果是( )。
#include <iostream>
using namespace std;
void swap(int &a,int &b)
int temp;
temp=a;
a=b;
b=temp;
void main( )
int x=2;
int y=3;
swap(x,y);
cout<<x<<y;
A. 23
B. 32
C. ab
D. ba
[单项选择]下面程序输出的结果是( )。 #include<iostream> using namespace std; int test(int n1,int n2) {return n1 +n2;} float test (int f1,float f2){return f1-f2;} float test(float x,float y){return(x+y)/2;} float test(float x,int y){return(x+y)*2;} void main( ){ int a1=10; float a2=2.5f; cout<<test(a1,a2); }
A. 12.5
B. 7.5
C. 6.25
D. 25
[填空题]下面程序输出的结果是
【11】 。
#include <iostream>
using namespacc std;
class A
public:
void show( )tout<<"A!";
;
class B: public A
public:
virtual void show( )cout<<"B!";
;
class C: public B
public:
virtual void show( )cout<<"C!";
;
void show_info(A *i)i->show( );
void main( )
A ia;B ib;C ic;show_info(&i
- a); show_info(&i
- b);show_info(&i
- c);
[填空题]下面程序输出的结果是
【10】 。
#include <iostream>
using namespace std;
class A
public:
virtual void show( ) cout<<"A!";
;
class B: public A
public:
void show( ) cout << "B!";
;
class C: public B
public:
void show( )cout << "C!";
;
void show_info(A &i) i. show( );
void main( )
A ia; B ib; C ic; show_info(i
- a);show_info(i
- b); show_info(i
- c);
[单项选择]下面程序输出的结果是
#include<iostream.h>
void main( )
int i;
int a[3][3]=1,2,3,4,5,6,7,8,9;
for(i=0;<3;i++)
cout<<a[2-i][i]<<" ";
A. 1 5 9
B. 7 5 3
C. 3 5 7
D. 5 91
[单项选择]下面程序的输出结果是 #include<iostream.h> #include<string.h> void main( ) { char p1[10],p2[10] strcpy(p1,"abc"); strcpy(p2,"ABC"); char str[50]="xyz"; strcpy(str+2,strcat(p1,p2)); cout<<str; }
A. xyzabcABC
B. zabcABC
C. xyabcABC
D. yzabcABC
[单项选择]下面程序的输出结果是
#include<iostream.h>
#include<string.h>
void main( )
char p1[10],p2[10]
strcpy(p1,"abc");
strcpy(p2,"ABC");
char str[50]="xyz";
strcpy(str+2,strcat(p1,p2));
cout<<str;
A. xyzabcABC
B. zabcABC
C. xyabcABC
D. yzabcABC
[单项选择]下面程序的输出结果是( )。
#include<iostream>
#include<math.h>
using namespace std;
class point
private:
double x;
double y;
public:
point(double a,double b)
x=a;
y=b;
friend double distances(point a,point b);
;
double distances(point a,point b)
return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
int main( )
point p1(1,2);
point p2(5,2);
cout<<distances(p1,p2)<<end1;
return 0;
A. 2
B. 4
C. 8
D. 16
[单项选择]下面程序的输出结果是( )。 #include<iostream> #include<string> using namespace std; void main( ){ charp1[10],p2[10]; strcpy(p1,"abc"); strcpy(p2,"ABC"); charstr[50]="xyz"; strcpy(str+2,strcat(p1,p2)); cout<<str; }
A. xyabcABC
B. yzabcABC
C. xyzabcABC
D. zabcABC
[单项选择]下面程序的输出结果是( )。
#include<iostream>
#include <math.h>
using namespace std;
class point
private:
double x;
double y;
public:
point(double a, double b)
x=a;
y=b;
friend double distances(point a,point b);
;
double distances(point a,point b)
return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
int main( )
point p1 (1,2);
point p2(5,2);
cout<<distances(p1 ,p2)<<end1;
return 0;
A. 2
B. 4
C. 8
D. 16
[单项选择]下面程序输出的结果是( )。
#include<stdio.h>
main( )
char *a="1234";
fun(a);
printf("/n");
fun(char *s)
char t;
if(*s)
t=*S++;fun(s);
else return;
if(t!='/0')
putchar(t);
A. 1234
B. 4321
C. 1324
D. 4231
[单项选择]下面程序的输出结果是
#include <stdio.h>
#include <string.h>
main( )
char p1[20]="abc",*p2="ABC", str[50]="xyz";
strcpy(str+2,strcat(p1,p2));
printf("%s/n",str);
A. xyzabcABC
B. zabcABC
C. xyabcABC
D. yzabcABC
[单项选择]下面程序的输出结果是( )。
#include <iostream.h>
#include "string.h"
void main( )
char a[]="welcome",b[]="well";
strcpy(a,b);
cout<<a<<endl;
A. wellome
B. well com
C. well
D. well we
[单项选择]下面程序的输出结果是
# include <iostream.h>
class example
int a;
public:
example (intb) a=b++;
void print ( )a=a+1; cout << a <<" ";
void print ( ) const cout << a <<" ";
;
void main ( )
example x (3);
const example y (2);
x. print ( );
y.print ( );
A. 2 2
B. 4 3
C. 4 2
D. 3 2