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POhow to code this northwest method
 

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  1. POhow to code this northwest method
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    <p>I'm a student trying to learn about programming and have never done any complex coding before. Recently my lecturer gave me a task on Northwest corner method. I followed a code found on the internet but there seems to be some problems with this code which I cannot figure out as I'm still a beginner. I did some readings but I still couldn't figure out what the problems are and am quite sure there are many problems lies with the coding. I'm really thankful to those who are willing to take a look on the coding. Thanks in advance. :)</p> <pre><code>#include "stdafx.h" int _tmain(int argc, _TCHAR* argv[]) { return 0; } using namespace std; #include &lt;iostream&gt; #include &lt;fstream&gt; const int row_max =4; const int col_max =4; int i,j; //create supply_array and require_array float supply_array[row_max]; float require_array[col_max]; //creating the cost matrix and unit matrix float cost_matrix[row_max][col_max]; float unit_matrix[row_max][col_max]; //initialize cost_matrix int main() { for(i=0 ; i&lt;=row_max ; i++) { for(j=0 ; j&lt;=col_max ; j++) { cin &gt;&gt; cost_matrix[i][j]; } } //initialize unit_matrix for(i=0 ; i&lt;=row_max ; i++) { for(j=0 ; j&lt;=col_max; j++) { unit_matrix[i][j]=0; } } float cost_minimal= 0.0; float *supply_ptr; float *require_ptr; supply_ptr = &amp;supply_array[4]; require_ptr = &amp;require_array[4]; //initialize supply_array for(i=0 ; i&lt;=row_max ; i++) { cin &gt;&gt; supply_array[i]; } //initialize require_array for(i=0 ; i&lt;=col_max; i++) { cin&gt;&gt;require_array[i]; } float *matrix_ptr; matrix_ptr = &amp;cost_matrix[0][0]; int r=0,c=0,x=0,y=0; while((x&lt;= row_max) &amp;&amp;( y=col_max)) { if(*require_ptr&gt;*supply_ptr) { unit_matrix[x][y]=supply_array[x]; require_array[y]=require_array[y]-unit_matrix[x][y]; supply_array[x]=supply_array[x]-unit_matrix[x][y]; cost_minimal=cost_minimal+unit_matrix[x][y]; x=x+1; supply_ptr=supply_ptr+1; matrix_ptr=matrix_ptr+col_max; continue; } if(*require_ptr&lt;*supply_ptr) { unit_matrix[x][y]=require_array[y]; require_array[y]=require_array[y]-unit_matrix[x][y]; supply_array[x]=supply_array[x]-unit_matrix[x][y]*cost_matrix[x][y]; y=y+1; x=x+1; require_ptr=require_ptr+1; supply_ptr=supply_ptr+1; matrix_ptr=matrix_ptr+col_max; continue; } } //displaying the unit matrix for(i=0;i&lt;=row_max;i++) { for(j=0;j&lt;=col_max;j++) { cout&lt;&lt;unit_matrix[i][j]; } } //displaying the minimal cost cout&lt;&lt; "the minimal cost obtained is : "&lt;&lt;cost_minimal; return 0; } </code></pre>
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    1. USAzima abd. rahim
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    1. COyou know what would probably work better? Reading a book, learning what you're doing, and coding it yourself from scratch. Then you'll actually write good code that you will know how to debug yourself because you'll *know* what it means instead of finding something on the internet and trying to figure out what it means.
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      1. USColleen
    2. COso, what is this code supposed to do, and what are the problems?
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      1. USSam I am
    3. COLearn about "indentation" - it would make your code MUCH easier to read!
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      1. USMats Petersson
 

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