Grids Included
Need help printing an 2D array in the grid shape it is scanned from a file in in C programming? Code included.?
include
main()
{
FILE *solution;//declare pointer for the file
int i, j, status;//declare variables
int a[9][9];//declare 2-D array
solution = fopen(“sudoku-solution.txt”, “r”);//open file and read it
for(i=0; i<9; ++i){
for(j=0; j<9; ++j){
while(1){
status = fscanf(solution, "%d", &a[i][j]);
if (status == EOF) break;
else fscanf(solution, "%d", &a[i][j]);
}
}
}
for(i=0; i<9; ++i){
for(j=0; j<9; ++j)
printf("%d", a[i][j]);
}
fclose(solution);//close file
}
In the printf, use a fixed-width formatter, and an end of line. Here’s the answer, with some clean-up:
include
int main(void) {
…FILE *solution = fopen(“sudoku-solution.txt”, “r”);//open file and read it
…int i, j, status;//declare variables
…int a[9][9];//declare 2-D array
…for(i=0; i<9; ++i)
......for(j=0; j<9; ++j)
.........status = fscanf(solution, "%d", &a[i][j]);
...for(i=0; i<9; ++i) {
......for(j=0; j<9; ++j)
.........printf("%2d", a[i][j]); // Outputs items in fixed width
......puts(""); // Starts a new line
...}
...fclose(solution);//close file
...return 0; // Shows operational success
}
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