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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 |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); \# W0 _' Q0 r3 f- _5 l* S
printf("%f",a);6 o- V" n6 }$ z, M; d/ H8 V% ~8 y: C
 }0 W R) c6 c# g6 V
<> for (i=0;i<n;i++)4 X) |6 K l: U+ b4 C5 k( V
for (j=0;j<m;j++)2 x" y. U1 U; ?. L6 m
 if (j==m-1) printf("%15.2f\n",a[i*m+j]);2 P. w6 V: C6 Q" @- W3 ]
 else printf("%15.2f",a[i*m+j]);
% d2 i! r$ e; U1 \* ^<> for(i=0;i<m;i++)
7 r; a, g: L0 @9 |) ? {9 \+ \1 D, k6 n D8 p
for(j=0;j<n;j++)
( w9 ~) z$ `: i- | b+=1.0/n*a[i+j*m];
2 ~& X7 \+ k5 X% w; Q }
. }, G) K. m- n8 S<>
5 t7 t3 w) M% u+ W% h: B fclose(fa);, s4 F2 p, l8 D& |
<> if((fb=fopen("result.txt","w"))==NULL)
% c' @4 j( ]$ n; b1 S: K {
, D- ?+ [ J: C, u printf("Result file do not exist.\n");
6 m! q3 F- Z3 H9 i exit(0);
" k( ~3 R, G7 M$ F }
& H. f! x% i7 _( E. o) r<> else" P1 w! g3 D0 K& f
 {
" N$ R3 N' P+ O' i+ s$ f ~ fprintf(fb,"The average of matrix:\n");# @# X+ W. W' W, T L. o) [
fprintf(fb,"\n");
7 _4 U* Z' |4 t" e for(i=0;i<m;i++)3 m/ Y c3 p2 a3 @, ?/ o$ h+ x
fprintf(fb,"%15.3f",b);( U( e3 x @) E" B# n, g$ k" I
fprintf(fb,"\n");
9 J0 U. |4 V; O9 W1 y; ~+ m$ F } ?9 s5 h# Z% ?9 V+ R T
 fclose(fb);5 D6 C" y- n; L. J
 printf("Have done!The result in file:result.txt\n");
: m6 q4 n6 A" k! l0 h+ u<>}