# input file problem

Discussion in 'C' started by favorsight861993, Dec 13, 2011.

1. ### favorsight861993Banned

Joined:
Dec 13, 2011
Messages:
2
0
Trophy Points:
0
I write a code for a problem. My roblem is:
Enter n x m integers from text file
Arrange above integers on the way from from outside to inside in a certain order of the matrix nx m.
Export results to a text file.
I don't know how to make "input.txt" to make the program run perfectly. If u can, please send me ur file "input.txt"
Here is my code:

Code:
```#include <stdio.h>

#define MAXN 110

int a[MAXN][MAXN], m, n;

void input(){
scanf("%d %d", &n, &m);
}

void initial(){
int i;
for (i = 0; i<=n+1; ++i){
a[i][0]=-1;
a[i][m+1]=-1;
}
for (i = 0; i<=m+1; ++i){
a[0][i]=-1;
a[n+1][i]=-1;
}
}

void solve(){
int dx[] = {-1, 0 , 1, 0};
int dy[] = {0, 1, 0, -1};
int tx = 1, ty = 1, dir = 0, i;
a[1][1] = 1;
for (i = 2; i<=n*m; ++i){
while (a[tx+dx[dir]][ty+dy[dir]]){
dir = (dir+1)%4;
}
tx = tx + dx[dir];
ty = ty + dy[dir];
a[tx][ty] = i;
}
}

void output(){
int i, j;
for (i = 1; i<=n; ++i){
for (j = 1; j<=m; ++j){
printf("%4d ", a[i][j]);
}
printf("\n");
}
}

int main(){
freopen("D:\input.txt", "r", stdin);
freopen("D:\output.txt", "w", stdout);
input();
initial();
solve();

output();
return 0;
}
```

Joined:
Jul 12, 2004
Messages:
15,296
366
Trophy Points:
83
Please stop creating the same thread. I see it 4 times now.

3. ### xpi0t0sMentor

Joined:
Aug 6, 2004
Messages:
3,012
203
Trophy Points:
63
Occupation:
Senior Support Engineer
Location:
England
The program only reads two integers, so just use Notepad to create input.txt containing something like:
Code:
```27 36
```