float型float f=3.4是否正确。
public class Test { private static float[] f = new float[2]; public static void main(String args[]) { System.out.println(“f[0] = “ + f[0]); } } What is the result?()
float f[][][] = new float[3][][]; float f0 = 1.0f; float[][] farray = new float[1][1]; What is valid?()
类Teacher: class Teacher{ String name; float salary; Teacher(String name){ this.name = name; } Teacher(String name,float salary){ this.name = name; this.salary = salary; } } 执行语句Teacher t = new Teacher(“Tom”,2000.0f);后,字段salary的值是哪一项?()
class BaseClass{ private float x= 1.0f; protected void setVar (float f) {x = f;} } class SubClass exyends BaseClass { private float x = 2.0f; //insert code here 8. } Which two are valid examples of method overriding?()
class BaseClass{ private float x= 1.0f; protected void setVar (float f) {x = f;} } class SubClass extends BaseClass { private float x = 2.0f; //insert code here 16. } Which two are valid examples of method overriding?()
class BaseClass{ private float x= 1.0f; protected void setVar (float f) {x = f;} } class SubClass extends BaseClass { private float x = 2.0f; //insert code here } Which two are valid examples of method overriding?()
10. public Object m() { 11. Object o = new Float(3.14F); 12. Object [] oa = new Object[1]; 13. oa[0] = o; 14. o = null; 15. return oa[0]; 16. } When is the Float object, created in line 11, eligible for garbage collection?()
public class ArrayTest { public static void main(String[] args) { float fl[], f2[]; fl = new float[10]; f2 = f1; System.out.println(“f2[0]= “ + f2[0]); } } What is the result?()
1. public class X ( 2. public object m () { 3. object o = new float (3.14F); 4. object [] oa = new object [1]; 5. oa[0]= o; 6. o = null; 7. return oa[0]; 8. } 9. } When is the float object created in line 3, eligible for garbage collection?()
public class ArrayTest { public static void main (Stringargs) { float f1, f2; f1 = new float [10]; f2 = f1; System.out.printIn (“f2[0]=” + f2[0]); } } What is the result?()
public class X { public object m () { object o = new float (3.14F); object oa = new object [1]; oa[0]= o; o = null; return oa[0]; } } When is the float object created in line 3, eligible for garbage collection?()
#include void main(){ int max(flaot x, float y);float a, b;int c;scanf(“%f,%f”, &a, &b);c=max(a, b);printf(“Max is %d”, c);}int max(float x, float y){ float z;z = x > y ? x : y;return z;}函数max的返回值是什么数据类型( )
以下程序的功能是计算函数F(x,y,z)=(x+z)/(y-z)+(y+2×z)/(x-2×z)的值,请将程序补充完整。#includefloat f(float x,float y){float value;value= 【1】;return value;}main(){float x,y,z,sum;scanf(%f%f%f,&x,&y,&z);sum=f(x+z,y-z)+f(【2】);printf(sum=%f\n,sum);}
下列程序输出结果?#define PI 3.14#define S(r) PI*r*rmain(){float a,area;a=2; area=S(a); printf(“r=%f,area=%f”,a,area); }
下列的哪个赋值语句是不正确的?()A.float f=11.1;B.double d=5.3E12;C.float d=3.14f;D.double f
4、若有以下定义,则释放指针所指内存空间的操作是: float *r=new float[10];
有下列函数定义:fun(float h){printf("%f,%f\n",h,h*h);}该函数的类型是()。A.int类型B.float类型
有程序片段如下,以下哪个表示式的结果为true()Float s=new Float(0.1f);Float t= new Float(0
以下程序的输出结果是()。 include <stdio.h> main() {int x=10;float pi=3.1416; printf
请分析指出以下代码中存在的问题。 public class My_Average_scores { public float getAverage(String [] scores ) { if (scores==null || scores.length==0) { throw new NullPointerException(); } float sum = 0.0F; int j=scores.length; for (int i=1; i<j; i++) { sum += scores[i]; } return sum/j; }
下列是一个Java Applet程序,填空使它的功能为计算数组各元素的和。程序执行完后sum 的值应为21.0。 import java.applet.*; import java.awt.*; public class Testxx extends Applet { float a=new 【9】 [6]; float sum=0.0f; public void init() { for(in
给定程序如下public static void main(String args[]) {Float f=new Float(4.2f);Float c;Doub
10、已知有下列类的说明,则下列哪个语句是正确的?() public class Test { private float f = 1.0f; int m = 12; static int n = 1; public static void main(String arg[]) { Test t = new Test(); } }