Topic example: (is not a problem)


Welcome interested in program bosses in the post below message, will not be regularly and pored over Java topics for bosses to challenge

CodePudding user response:

Readily write in a

 
Public class Test3 {
Public static int [] [] createArray (int row) {
If (row<=0) return null; 
Int res [] []=new int [row] []; 
for (int i=0; iRes [I]=new int [row - I]; 
/* 
for (int j=0; jRes [I] [j]=0; 
} 
*/
} 
return res; 
} 

Public static void printArray (int [] [] a) {
If (a==null) {
System. The out. Println (" a is null. "); 
} 
for (int i=0; ifor (int j=0; jSystem. The out. Printf (" % d ", a [I] [j]); 
} 
System.out.println(); 
} 
} 

Public static void main (String [] args) {
Scanner sc=new Scanner(System.in); 
Int row=0; 
While (true) {
Try {
System. The out. Printf (" please enter the number of lines: "); 
The row=sc. NextInt (); 
If (row<=0) throw new Exception (" error "); 
break; 
} the catch (Throwable e) {
System. The out. Println (" input error, please heavy lose, "); 
} 
} 
Int [] [] a=createArray (row); 
PrintArray (a); 
} 
} 

CodePudding user response:

refer to the second floor qq_41722962 response:

Quote: refer to 1st floor qybao response:

Readily write in a

 
Public class Test3 {
Public static int [] [] createArray (int row) {
If (row<=0) return null; 
Int res [] []=new int [row] []; 
for (int i=0; iRes [I]=new int [row - I]; 
/* 
for (int j=0; jRes [I] [j]=0; 
} 
*/
} 
return res; 
} 

Public static void printArray (int [] [] a) {
If (a==null) {
System. The out. Println (" a is null. "); 
} 
for (int i=0; ifor (int j=0; jSystem. The out. Printf (" % d ", a [I] [j]); 
} 
System.out.println(); 
} 
} 

Public static void main (String [] args) {
Scanner sc=new Scanner(System.in); 
Int row=0; 
While (true) {
Try {
System. The out. Printf (" please enter the number of lines: "); 
The row=sc. NextInt (); 
If (row<=0) throw new Exception (" error "); 
break; 
} the catch (Throwable e) {
System. The out. Println (" input error, please heavy lose, "); 
} 
} 
Int [] [] a=createArray (row); 
PrintArray (a); 
} 
} 

, hope bosses can continue to focus on this, the subsequent will distribute more topic

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