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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);
* a8 N& l( L+ ~: @& A: z printf("%f",a);
$ n! [0 `5 {+ d* s* ]6 O' S }$ W5 ^2 F6 a( D' k0 p
<> for (i=0;i<n;i++)- s c3 Y4 [0 E( H# C5 Y
for (j=0;j<m;j++)
! Y- s% L0 v! A- W if (j==m-1) printf("%15.2f\n",a[i*m+j]);8 a$ o) M2 b0 p1 Y$ J
 else printf("%15.2f",a[i*m+j]);0 @, N% h. y' X, g# `
<> for(i=0;i<m;i++)
9 o' ]2 R! T: t, _/ ?9 | {7 K9 o! z; }5 e8 d$ P) u; K+ _) t
for(j=0;j<n;j++)
. U0 }' ~& Q% Q$ r2 ?& ]' A b+=1.0/n*a[i+j*m];
" b; o5 H& _1 ~' z( ~1 w }' G5 }0 I. y0 l
<>
8 F/ ?9 d. v- t1 `# v fclose(fa);- Z; u( }6 U4 c |7 s+ u
<> if((fb=fopen("result.txt","w"))==NULL)
6 r0 q7 l/ R; I/ e% _2 H {
% s: O9 J' b5 h! _ printf("Result file do not exist.\n");9 C: a! X2 Q: b: A% w; s
exit(0);
: v5 z2 L! ? g& T0 O) ^; _9 i }
: M5 Q5 {" ?; }! V% x<> else
# Z- `2 B% u1 f+ E {& d: K1 R# S" j7 l I
fprintf(fb,"The average of matrix:\n"); ?, @3 K8 R8 s$ V& B+ n
fprintf(fb,"\n");
" `: F p, b$ e, L, l8 b5 I for(i=0;i<m;i++)3 ^) N9 R$ \% _
fprintf(fb,"%15.3f",b);# w1 m1 h5 v. p- Z) D4 D* h
fprintf(fb,"\n");" Z5 V$ U, T' \2 d9 n/ O5 Y
 }. J+ R0 o! c! ~9 v+ e% y+ E7 f
 fclose(fb);9 ~# x, l; f8 t; w2 l
 printf("Have done!The result in file:result.txt\n");& P/ x5 ?- o' } u; B" h
<>}