单选题现有: 1.class Over { 2.int dolt (long x) { return 3; } 3. } 4. 5. class Under extends Over { 6.//insert code here 7. } 和四个方法: short dolt (int y) { return 4; } int dolt(long Xr long y) { return 4; } private int dolt(short y) { return 4; } protected int dolt (long x) { return 4; } 分别插入到第6行,有几个可以通过编译?()A 1B 2C 3D 4
单选题
现有: 1.class Over { 2.int dolt (long x) { return 3; } 3. } 4. 5. class Under extends Over { 6.//insert code here 7. } 和四个方法: short dolt (int y) { return 4; } int dolt(long Xr long y) { return 4; } private int dolt(short y) { return 4; } protected int dolt (long x) { return 4; } 分别插入到第6行,有几个可以通过编译?()
A
1
B
2
C
3
D
4
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以下程序运行结果是【8】 。long fib (int g){ switch (g){ case 0∶return 0;case 1∶case2∶return 1;}return (fib (g-1)+fib(g-2));}main (){ long k;k=fib (5);printf ("k=%(d\n)",k);}
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有如下程序: include using namespace std; class Sample { frien 有如下程序: #include <iostream> using namespace std; class Sample { friend long fun(Sample s); public: Sample(long a) {x=a;} private: long x; }; long fun(Sample s) { if(s.x < 2) return 1; return s.x * fun(Sample(s.x-1)); } int main() { int stun = 0; for (int i=0; i<6; i++) {sum += fun(Sample(i));} cout << sum; return 0; }运行时输出的结果是A.120B.16C.154D.34
下列程序的输出结果是______。long fun5(int n)( long s;if((n==l)‖(n==2))s=2;elses=n+fun5(n-1);return(s);}main(){ long x;x=fun5(4);printf(%1d\n",x);
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有如下程序: #inCludeiostream using namespaCe std; Class Sample{ friend long fun(Sample S); publiC: Sample(10ng A.{x=a;} private: long X; }; long fun(Sample S){ if(S.x2)return l; return S.X*fun(Sample(s.x-1)); } int main( ) { int sum=0; for(int i=0;i6;i++) {sum+=fun(Sample(i));} Coutsum: return 0; } 执行这个程序的输出结果是( )。A.120B.16C.154D.34
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有以下程序 include using namespace std; long fib(int n) { if(n>2) return(fib(n-1 有以下程序include<iostream>using namespace std;long fib(int n){if(n>2)return(fib(n-1)+fib(n-2));elsereturn 2;}int main( ){cout<<fib(3)<<endl;return 0;}则该程序的输出结果应该是______。
1. public class ReturnIt { 2. return Type methodA(byte x, double y) { 3. return (long)x / y * 2; 4. } 5. } What is the narrowest valid returnType for methodA in line2?() A、 intB、 byteC、 longD、 shortE、 floatF、 double
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