Read data from input file

[문교식]

Obj; Read numbers from input file,
     Store them in a 2-dimensional array,
     and then Print the data.

Data File; INPUT.TXT  ======================
5 12
9 9
9 21
10 4
11 13
15 16
17 9
19 5
20 15
21 11

=> Store input data into Dat (2-dim) array;

0       0        0
0       5        12
0       9        9
0       9        21
0       10      4
0       11      13
0       15      16
0       17      9
0       19      5
0       20      15
0       21      11
  ; Dat[[1..N][1,2]; data region

 
Locations where zeroes are present may be used for some other purpose.
   

Program =====================================

FILE *INF;     // INF; input file pointer
#define N 4         // num of data pts.
int Dat[N+1][2+1];  // data N*2 Matrix Dat[1..N][1,2]

main() {
int row, col;
                // Open INPUT.TXT
  if ((INF=fopen("INPUT.TXT","r"))==NULL) {
 printf("\nERROR: cannot open input file - INPUT.TXT \n ");
 getch(); exit(0);
  }

                // Read Data from INPUT.TXT
  for(row=1; row<=N; row++) {  // read data pts
   fscanf(INF,"%d %d", &Dat[row][1],&Dat[row][2]);  // (x,y) coord
  }

                // Print Data from Dat[][]
  printf("\n\n SHOW Dat[] ------------ ");
  for(row=1; row<=N; row++) {  // Init.Dat[][]
      printf("\n%5d: ",row);
   for (col=1; col<=2; col++) { printf("%5d ",Dat[row][col]); }
  }
  printf("\n-------------------------- ");

  fclose(INF);  // close input file pointer

} // main()