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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

1^#

发表于 2005-5-8 22:14 |只看该作者 |正序浏览

|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);0 k1 O' e, I6 y, h6 F8 C
printf("%f",a);' Y1 _2 c7 s9 [0 I$ U
 }: v7 }! p# j! A; o+ @4 V5 A
<> for (i=0;i<n;i++)
$ [. I) m- A; D: T, g* M7 r for (j=0;j<m;j++)
* R/ ?; h! O4 G! D% C' G if (j==m-1) printf("%15.2f\n",a[i*m+j]);
- ]$ o( j; ^+ V( \ L, R else printf("%15.2f",a[i*m+j]);
. [7 }; } }; v# V<> for(i=0;i<m;i++)
) s0 T. Z1 \# G- ` {
; ?' N# F1 o3 G# J8 c for(j=0;j<n;j++) N6 s- K% P$ i# [9 ~
b+=1.0/n*a[i+j*m];& o n' V/ E) r2 z
 }# L7 K" B. g; ]2 j% R$ f' M$ V
<>
, c8 A0 m7 {+ I) O/ m1 t5 t3 ^! b fclose(fa);
& i5 {6 }# a0 z9 b<> if((fb=fopen("result.txt","w"))==NULL): A# s7 `& |- d1 J
 {
9 c( T( O% _1 X; Q# Z# t) M printf("Result file do not exist.\n");% b- J/ b! C% M! B8 p
exit(0);
7 H8 q' H7 \0 E: j, a8 K+ m, s }
5 v. g8 U% T8 ~0 O# G<> else
& L% S! n/ c5 Y! |+ ~; }, n {, k! v q7 M' \+ \8 n9 z
fprintf(fb,"The average of matrix:\n");* m# t, y0 J( ?
fprintf(fb,"\n");' `+ ?4 A, j1 t; ^" }: T
for(i=0;i<m;i++)
/ G4 J3 q9 Z _8 F5 k# G1 q fprintf(fb,"%15.3f",b);3 Y$ j9 @ x1 Y S$ U' A# J4 }* i
fprintf(fb,"\n");
2 ^. R! \9 t1 ^4 `: z }. z1 O7 K ^5 v3 B8 C+ y
 fclose(fb);
" B& ^ z2 K7 { printf("Have done!The result in file:result.txt\n");
. C$ X5 e6 a+ Q<>}