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[求助]C做的一个程序，读不进去数据哦~~~

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电梯直达

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发表于 2005-5-8 22:14 |只看该作者 |倒序浏览

|招呼Ta 关注Ta

<

>这是求矩阵的列的平均值的程序
<

>#include<stdio.h>
#define N 100
#define M 20
<

>void main()
{
FILE *fa,*fb;
char filename[30];
int n,m,i,j;
double a[N*M]={0.0},b[M]={0.0};
<

> printf("

lease input the number of columns and lines of matrix:n,m\n",N,M);
scanf("%d%d",&n,&m);
<

> while(n>N||n<=0||m>M||m<=0)
{
printf("

lease input number of matrix:n(0<n<N),m(0<m<M)again!\n",N,M);
scanf("%d%d",&n,&m);
}
<

> printf("

lease input a filename:\n");
printf("\n");
scanf("%s",filename);
<

> if((fa=fopen(filename,"r"))==NULL)
{
 printf("File is not exist.Please creat a file.\n");
 exit(0);
}

 while(!feof(fa))
 {
for(i=0;i<m;i++)
fscanf(fa,"%f",&a);" d. c/ v3 \3 z, f
printf("%f",a);
- G4 n( N. ]: P ~4 \ }
/ d- R/ s& M1 P7 t2 k3 T2 M<> for (i=0;i<n;i++)
! h0 x8 s! J ^: g$ Z" ?, W for (j=0;j<m;j++)
/ f0 F% P6 Q. _7 G, ~5 j! x- w7 v if (j==m-1) printf("%15.2f\n",a[i*m+j]);9 ]' C7 X& C4 n% x# B' h6 R) k
 else printf("%15.2f",a[i*m+j]);
: M: A3 b: n6 u" f3 a<> for(i=0;i<m;i++)
) n U$ I9 s1 K { k( g5 i3 J. g" G) V# v+ j
for(j=0;j<n;j++) d/ G i: U; Q. i$ c( w: a
b+=1.0/n*a[i+j*m];
% ^1 z" G' [: l' H }
% M. o {: B2 j2 k( V( `2 ?% ]<>( H4 {9 P) _- c% M+ v! L) w
 fclose(fa);
* S7 w( B' J# t) [1 O/ t<> if((fb=fopen("result.txt","w"))==NULL)
0 y: }$ L# m" {3 `3 ]5 B! {$ Y {
2 ]8 ]- l$ `. S l; b. O printf("Result file do not exist.\n");
4 P4 H$ [2 V6 t. J; c exit(0);
* F* [# _/ ^; A& L# p, J }
9 n. k: L# B9 h# j* e( ?4 |<> else
! e4 M! X( l7 z; a. L J {2 C2 p" p2 i) M. e1 Z W+ _
fprintf(fb,"The average of matrix:\n");
) L# C" a) A- G. d# D, w fprintf(fb,"\n");# f9 H; Z+ ^. b+ I( \6 k6 v
for(i=0;i<m;i++)
. L- G* u2 C! Y* c5 M3 Q fprintf(fb,"%15.3f",b);" b8 g0 W3 e, r3 J9 Q
fprintf(fb,"\n");
$ e# m4 h, y9 ~. T) L }, |, p9 Y: I h0 A$ [% @( t
 fclose(fb);
* K% ^8 O. Y1 U2 C: n: q printf("Have done!The result in file:result.txt\n");
5 H% d1 }' l# |( P( X<>}