# A few questions, exercise your mind

Source: Internet
Author: User

Not written for a long timeCodeI forgot, so I found some useful questions on the Internet a few days ago and wrote them for fun.

The following code is implemented in C.

1 9-9 multiplication table

`# Include <stdio. h> Void  Main (){  Int  I;  Int  J;  For (I = 1 ; I <= 9 ; I ++ ){  For (J = 1 ; J <= I; j ++ ) {Printf (  "  % D x % d = % d  " , J, I, I * J); printf (  "   "  );} Printf (  "  \ N  "  );}} `

2 Bubble Sorting

`# Include <stdio. h>Void  Main (){  Int  I, J;  Int  Temp;  Int A [ 10 ] = { 1 , 5 , 7 , 8 , 2 , 0 , 3 ,6 , 4 , 9  };  For (I = 0 ; I < 10 ; I ++ ){  For (J = 0 ; J <I; j ++ ){  If (A [J]> A [J + 1  ]) {Temp =A [J]; A [J] = A [J + 1  ]; A [J + 1 ] = Temp ;}}}  For (I = 0 ; I < 10 ; I ++ ) {Printf (  "  % D \ n  "  , A [I]) ;}} `

3. Search for prime numbers -.

`# Include <stdio. h>VoidMain (){IntI;For(I =100; I <200; I ++){If(I %2=1) {Printf ("% D \ n", I );}}} `

4. How many daffodils are there -?

`# Include <stdio. h> Void Main (){  Int  A;  Int  I, J, K;  For (A = 100 ; A <= 999 ; A ++ ) {I = ( Int ) (/ 100  ); J = ( Int ) (A % 100 )/ 10 ); K = A % 10  ;  If (A = getcube (I) + getcube (j) + Getcube (k) {printf (  "  % D \ n  "  , A); printf (  "  % D, % d, % d \ n  "  , I, j, k );}}}  Int Getcube ( Int A ){  Return A * * A ;} `

5. 5!

``` # include

void
main () {
int
; A  = GCB (
5
); printf (
"
% d \ n
"
,a) ;}
int  GCB (
int
) {
If  (! =
1
) {
return  A * GCB (a-
1
) ;}
else
return
;}
```

6. Enter a two-dimensional array to obtain the sum of diagonal elements.

`# Include <stdio. h> Void  Main (){  Int A [ 3 ] [ 3  ];  Int  I, J;  Int Temp = 0  ;  For (I = 0 ; I <3 ; I ++ ){  For (J = 0 ; J < 3 ; J ++ ) {Scanf (  "  % D  " ,& A [I] [J]) ;}}  For (I = 0 ; I < 3 ; I ++ ){ For (J = 0 ; J < 3 ; J ++ ){  If (I = j | ABS (I-j) = 2  ) {Temp = Temp + A [I] [J] ;}} printf (  "  % D \ n  "  , Temp );} `

These are all questions I made when I went to school, but now it seems quite interesting. I really don't know what to do on the Internet.ProgramAh.
There are 50 questions in this link. You can refer to the question: http://bbs.csdn.net/topics/110067294.

Note: I am not a programmer. I just write code out of my personal hobbies or bored online. Please do not read or comment if you think you code yourself, so that you do not have to delete the comment, seriously, you lose.

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