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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);
& @2 x5 q6 L: ^. Y printf("%f",a);1 x* o* k; x# Y
 }
$ {4 g- H* A1 L% i( V2 h( U ~( G& z<> for (i=0;i<n;i++)4 U' A. `- P* ? o: o
for (j=0;j<m;j++)( [. j4 a+ g% e" \4 P0 S7 s
 if (j==m-1) printf("%15.2f\n",a[i*m+j]);
" g$ u4 e9 _7 G. p: O. j else printf("%15.2f",a[i*m+j]);
, g" C5 I' f& ?; [" E<> for(i=0;i<m;i++)! b3 i8 ?+ p: @8 W, n
 {3 u9 \/ G4 |! Y- [" ^
for(j=0;j<n;j++)% W5 p3 z9 w/ t
b+=1.0/n*a[i+j*m];8 ^5 Y3 e1 q0 _0 A9 ]
 }; R6 b) r* l" X5 T" R$ _
<>) A: t; {; f+ l7 C% e
 fclose(fa);' s# S9 V8 t+ c' d
<> if((fb=fopen("result.txt","w"))==NULL)
 @ F. t) O$ J6 W) m" G {
6 ]; O: E% ?1 b' U0 S! M% h printf("Result file do not exist.\n");
6 i3 o, }8 G0 s$ _( D exit(0);
 h& N/ S( G% \( U" K4 _& g }
! `: _' I# Y3 W. A<> else4 S$ `4 y9 I2 @ W
 {
( L# E6 ]6 T) l fprintf(fb,"The average of matrix:\n");
+ V4 Q H5 Q7 J: f% r& R( p; p( u fprintf(fb,"\n");
4 w' p) L' ?& l o+ Y. k6 A for(i=0;i<m;i++)
fprintf(fb,"%15.3f",b);4 ?0 ?) J1 I; @7 s
fprintf(fb,"\n");
4 E; E# V O1 J0 |1 l& n% h }
" y4 M, {& Y6 N+ o) N3 j6 F; J fclose(fb);9 H8 x' ^# c) I+ q/ k
 printf("Have done!The result in file:result.txt\n");
8 \. Y1 Y+ d6 y1 h% C<>}