C language file read and write commands fprintf and fscanf

Take the example of reading and writing a two-dimensional array to a file.

The following is the use of fprintf: writes a two-dimensional array of 10*10 to a file, and the array element is a random number between 1~100.

#include <stdlib.h> #include <iostream>using namespace Std;int main () {  int array[13][13],i,j;  FILE *FP = fopen ("Result.txt", "w"); if (!FP) {  printf ("Create and Open File failed\n");  return 0; } for (i=0;i<10;i++)  {for  (j=0;j<10;j++)   {    array[i][j]=rand ()%100+1;  }  } for (i=0;i <10;i++)  {   for (j=0;j<10;j++)   {   printf ("%d", array[i][j]);     fprintf (FP, "%d", array[i][j]);   }  printf ("\ n");   fprintf (FP, "\ n");    }  Fclose (FP); return 0;}

The following is the use of fscanf: reading a two-dimensional array in a file and displaying it on the screen

#include <cstdio> #include <stdlib.h> #include <iostream>using namespace std; #define M 6#define N 6int A [20] [20]={0};int Main () {int i,j;  FILE *fp=fopen ("Aa.txt", "RT"); if (!FP) {  printf ("Cannot open file\n");  return 0; } for (i=1;i<=m;i++) {for (j=1;j<=n;j++) {  fscanf (FP, "%d", &a[i][j]),  }} fclose (FP); for (i=1;i<=m ; i++) {for (j=1;j<=n;j++)     printf ("%d", a[i][j]);   printf ("\ n");} return 0;}

　　

For instructions on reading and writing C files, see the following links:

Http://www.cnblogs.com/songQQ/archive/2009/11/25/1610346.html

C language file read and write commands fprintf and fscanf