java预测题.docVIP

1、命令行输入十个数，计算 class shuzu { public static void main(String[] args) { int a[]=new int[10]; for(int i=0;i10;i++) a[i]=Integer.parseInt(args[i]); System.out.println(数组的最大值为：+Max(a,a.length)); System.out.println(数组的最小值为：+Min(a,a.length)); System.out.println(数组的和为：+Sum(a,a.length)); System.out.println(数组的平均数为：+avg(a,a.length)); } public static int Max(int a[],int n) { int max; max=a[0]; for(int j=1;jn;j++) if(a[j]max) max=a[j]; return (max); } public static int Min(int a[],int n) { int min; min=a[0]; for(int j=1;jn;j++) if(a[j]min) min=a[j]; return (min); } public static int Sum(int a[],int n) { int sum=0; for(int j=0;jn;j++) sum+=a[j]; return (sum); } public static float avg(int a[],int n) { float Pj; return (Sum(a,a.length)/a.length); } } 2、输出水仙花数 class shuixianhua { public static void main(String[] args) { int m,n,p,q; System.out.println(水仙花的数如下：); for(int i=100;i=999;i++) { m=i%10; q=i/10; n=q%10; p=q/10; if(i==(m*m*m+n*n*n+p*p*p)) System.out.print(i+ ); } } } 3、素数 class sushu { public static void main(String[] args) { int i,j; for(i=2;i=100;i++) { for(j=2;j=i/2;j++) { if(i%j==0) break; } if(ji/2) System.out.print(i+ ); } } } 4、计算前20项和 class fact { public static void main(String[] args) { double n=0; double y; for (double m=1; m=20; m++) { y = 1.0/fact(m); n = n+y; } System.out.println(前二十项和是+ +n); } public static double fact(double i) { double k=1; for (double x=1; x=i; x++) { k=k*x; } return k; } } （do while 语句） class fact { public static void main(String[] args) { double n=0; double y; double m=1; do { y = 1.0/fact(m); n = n+y; m++; }while(m=20); System.out.println(前二十项和是+ +n); } public static double fact(double i) { double k=1; for (double x=1; x=i; x++) { k=k*