Question

write a function in C that reads and saves the following from a file into A[9][9]. Save '-' as 0.

-32-8-5
7----4--1
23---7-6-
-4--1----
57--492--
--3---64-
--------7
-5----1--
31-758--6

Answer 1

`Hey,

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#include <stdio.h>
void readFile(int A[9][9],char fileName[])
{

FILE* file = fopen(fileName, "r"); /* should check the result */
char line[256];
int i=0;
int k;
for(i=0;i<9;i++)
{
for(k=0;k<9;k++)
{
A[i][k]=0;
}
}
i=0;
while (fgets(line, sizeof(line), file)) {
/* note that fgets don't strip the terminating \n, checking its
presence would allow to handle lines longer that sizeof(line) */
int j;
for(j=0;j<strlen(line);j++)
{
if(line[j]!='-')
A[i][j]=(line[j]-'0');
else
A[i][j]=0;
}

i++;
}

/* may check feof here to make a difference between eof and io failure -- network
timeout for instance */

fclose(file);
int j;
printf("Contents of the array are: \n");
for(i=0;i<9;i++)
{
for(j=0;j<9;j++)
{
printf("%d ",A[i][j]);
}
printf("\n");
}
}
int main(int argc, char* argv[])
{
int A[9][9];
char fileName[800]; /* should check that argc > 1 */

printf("Enter file name: ");
scanf("%s",fileName);
readFile(A,fileName);
return 0;
}

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