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#1
November 19th, 2002, 10:14 PM
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Reading file inputs and placing values into 2D array
Hey all,
I need to read an input file(any arbitrary file) that has matrix elements in it. Code:
Ex:
2 3
9 7 5
8 4 10
1 6
2 - int numrows;
3 - int numcols;
{(9,7,5),(8,4,10)} - matrix elements
1 - int start;
6 - int goal;
I need to read the matrix elements and place them in a 2-D array. Code:
|9 7 5| |8 4 10| I am guessing we need to use the numrows and numcols but we can ignore the start and goal variables for now. Would someone please help me along with this? Any feedback is appreciated as always. Thank you.
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#2
November 20th, 2002, 06:51 AM
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RE
after fopening the file and associating it with a handle
Code:
int num_col, num_row;
int start, goal;
int **arr;
fscanf(handle, "%d %d \n", num_col, num_row);
arr = new int*[num_row];
for (int i = 0; i < num_row; i++)
{
arr[i] = new int[num_col];
for (int j = 0; j < num_col; j++)
{
fscanf(handle, "%d \n", arr[i][j]);
}
}
fscanf(handle, "%d %d \n", start, goal);
this should read the needed data in the dinamic array (int **arr) you will have to delete the array after using it if you are writing the code in the C, not C++, use Code:
arr = (int **)malloc(num_row*sizeof(int*)); and arr = (int*)malloc(num_col*sizeof(int)); instead of new Hope it'll help
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