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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);
3 ^( ^+ U% z2 }8 Q printf("%f",a);/ H3 m! K8 F: z3 ?& `. A, }3 r+ f" O
 }
: I6 F. [; D, U6 x& W, P<> for (i=0;i<n;i++)
" E: l) Q7 R5 T/ A( E for (j=0;j<m;j++)! y3 U: {- [& j- g
 if (j==m-1) printf("%15.2f\n",a[i*m+j]);: Z) ^" X/ V& W' |7 U r
 else printf("%15.2f",a[i*m+j]);6 N( `6 p" x( a& ^: [8 z2 c. m
<> for(i=0;i<m;i++)
& n9 n* D0 p: ]: k: D: t {
$ \1 u5 M& q' R+ z for(j=0;j<n;j++)2 d/ E0 g L4 i
b+=1.0/n*a[i+j*m];5 l, j* F4 x# f* w
 }
1 o( K7 S& e: U! J2 h% S<>5 ~- R# v* v4 I& t
 fclose(fa);+ l. p7 t* R; ?) q' |& ?' W0 S& m
<> if((fb=fopen("result.txt","w"))==NULL)" E, i6 K( \3 [* C' F3 @9 W3 K
 {
6 N0 q4 g) N% V, K- s printf("Result file do not exist.\n");: g& N( w* U- r; C
exit(0);1 s& U1 W1 I J Q+ `6 p
 }
" J* i2 z( p w" M: b5 ?<> else* ?& x* s H2 Y& ~% p$ i
 {, I; @3 P+ s4 r& f6 J! N
fprintf(fb,"The average of matrix:\n");4 w( y" n- W, ] o4 }/ C; y
fprintf(fb,"\n");
6 \( y0 P+ ~+ h" K( ~ for(i=0;i<m;i++)
: ]3 y% K) e. U* a6 e/ J6 F- v& o fprintf(fb,"%15.3f",b);
- V: C: B- z I, a fprintf(fb,"\n");, O6 j: V7 W2 M& S; s
 }7 ^. f4 k4 _/ _+ ]# p
 fclose(fb);
 b% N( i! k: }- ?2 ?1 M5 K" j# q printf("Have done!The result in file:result.txt\n");7 N$ @1 U% }- d Q- G9 M( l. i
<>}