program to make spiral matrix

[KerriReeks]

hi !!!
i want to make a program for spiral matrix………i have exactly no idea how to code..
spiral matrix is like this::if input is 4

1 2 3 4
12 13 14 5
11 16 15 6
10 9 8 7

[GWILouisaxwzkla]

Can you give a definition of spiral matrix?

[KerriReeks]

firstly tell me u r that cman?

ya spiral matrix is like as i have given inthe question.in it i f the input is 4,then it will print the numers in 4 row and 4 column.just like a coil structure.

it will print 1 2 3 4,then it will go to 4th column and print 5
6
7
and so on…….in my previous post u can c that.although it seems not clear in it.
try to understand that matrix by observing the figure u can understand

[GWILouisaxwzkla]

I think this does what you want it to:

<br /> <br /> /****************************************************************<br /> * File Name : c:programshelptemp.cpp<br /> * Date :<br /> * Comments : new project<br /> * Compiler/Assembler :<br /> *<br /> *<br /> *<br /> *<br /> *<br /> * Program Shell Generated At: 3:59:55 p.m.<br /> =-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/<br /> <br /> <br /> #include < iostream.h ><br /> #include < ctype.h ><br /> //#include < conio.h ><br /> //#include < math.h ><br /> //#include < iomanip ><br /> //#include < ctype.h ><br /> <br /> //using namespace std;<br /> <br /> <br /> //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ FUNCTION PROTOTYPES @@@@@@@@@@@@@@@@@@@@@@@@@@<br /> <br /> <br /> <br /> //##################################################################################<br /> <br /> <br /> //main function ******************************<br /> <br /> int main ( )<br /> {<br /> <br /> <br /> int sizeOfMatrix;<br /> <br /> cout << "enter the size of the matrix: ";<br /> cin >> sizeOfMatrix;<br /> <br /> //allocate appropriate matrix:<br /> <br /> int ** matrix = new int * [ sizeOfMatrix ];<br /> if ( matrix == NULL )<br /> {<br /> cout << "Allocation Error!! ";<br /> return 1;<br /> }<br /> <br /> int i = 0;<br /> while ( i < sizeOfMatrix )<br /> {<br /> matrix [ i ] = new int [ sizeOfMatrix ];<br /> if ( matrix [ i ] == NULL )<br /> {<br /> <br /> while ( i >= 0 )<br /> delete [] matrix [ i -- ]; //clean up memory<br /> return 0;<br /> }<br /> i ++;<br /> }<br /> //write matrix<br /> i = 1;<br /> int j = 0;<br /> int input = 1;<br /> <br /> while ( j < sizeOfMatrix )<br /> {<br /> i = 0;<br /> <br /> while ( i < sizeOfMatrix )<br /> {<br /> <br /> matrix [ i ] [ j ] = input;<br /> i ++;<br /> input ++;<br /> }<br /> j ++;<br /> }<br /> <br /> //output matrix<br /> <br /> i = 0;<br /> j = 0;<br /> <br /> cout << endl;<br /> while ( i < sizeOfMatrix )<br /> {<br /> j = 0;<br /> <br /> while ( j < sizeOfMatrix )<br /> {<br /> cout << matrix [ i ] [ j ];<br /> //should use iomanip here!!!!!!!!<br /> if ( matrix [ i ] [ j ] < 10 )<br /> cout << " ";<br /> else<br /> cout << " ";<br /> j ++;<br /> }<br /> cout << endl;<br /> i ++;<br /> }<br /> <br /> //destroy matrix<br /> <br /> i = 0;<br /> while ( i < sizeOfMatrix )<br /> delete [] matrix [ i ++ ];<br /> <br /> <br /> }<br />

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

<br /> <br /> /****************************************************************<br /> * File Name : c:programshelptemp.cpp<br /> * Date :<br /> * Comments : new project<br /> * Compiler/Assembler :<br /> *<br /> *<br /> *<br /> *<br /> *<br /> * Program Shell Generated At: 3:59:55 p.m.<br /> =-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/<br /> <br /> <br /> #include < iostream.h ><br /> #include < ctype.h ><br /> //#include < conio.h ><br /> //#include < math.h ><br /> //#include < iomanip ><br /> //#include < ctype.h ><br /> <br /> //using namespace std;<br /> <br /> <br /> //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ FUNCTION PROTOTYPES @@@@@@@@@@@@@@@@@@@@@@@@@@<br /> <br /> <br /> <br /> //##################################################################################<br /> <br /> <br /> //main function ******************************<br /> <br /> int main ( )<br /> {<br /> <br /> <br /> int sizeOfMatrix;<br /> <br /> cout << "enter the size of the matrix: ";<br /> cin >> sizeOfMatrix;<br /> <br /> //allocate appropriate matrix:<br /> <br /> int ** matrix   = new int * [ sizeOfMatrix ];<br /> if ( matrix == NULL )<br /> {<br /> cout << "Allocation Error!! ";<br /> return 1;<br /> }<br /> <br /> int i = 0;<br /> while ( i < sizeOfMatrix )<br /> {<br /> matrix [ i ] = new int [ sizeOfMatrix ];<br /> if ( matrix [ i ] == NULL )<br /> {<br /> <br /> while ( i >= 0 )<br /> delete [] matrix [ i -- ]; //clean up memory<br /> return 0;<br /> }<br /> i ++;<br /> }<br /> //write matrix<br /> i = 1;<br /> int  j = 0;<br /> int input = 1;<br /> <br /> while ( j < sizeOfMatrix )<br /> {<br /> i = 0;<br /> <br /> while ( i < sizeOfMatrix )<br /> {<br /> <br /> matrix [ i ] [ j ] = input;<br /> i ++;<br /> input ++;<br /> }<br /> j ++;<br /> }<br /> <br /> //output matrix<br /> <br /> i = 0;<br /> j = 0;<br /> <br /> cout << endl;<br /> while ( i < sizeOfMatrix )<br /> {<br /> j = 0;<br /> <br /> while ( j < sizeOfMatrix )<br /> {<br /> cout << matrix [ i ] [ j ];<br /> //should use iomanip here!!!!!!!!<br /> if ( matrix [ i ] [ j ] < 10 )<br /> cout << "  ";<br /> else<br /> cout << " ";<br /> j ++;<br /> }<br /> cout << endl;<br /> i ++;<br /> }<br /> <br /> //destroy matrix<br /> <br /> i = 0;<br /> while ( i < sizeOfMatrix )<br /> delete [] matrix [ i ++ ];<br /> <br /> <br /> }<br />

heres the ouput:

enter the size of the matrix: 5

1 6 11 16 21
2 7 12 17 22
3 8 13 18 23
4 9 14 19 24
5 10 15 20 25
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