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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 o, x- `' m6 {* r printf("%f",a);
; `" z2 [( b2 @9 O8 L7 U! t }- Q4 T4 |1 S4 [4 p! c* V
<> for (i=0;i<n;i++)
, E* D1 |. N* ]9 M5 v- q for (j=0;j<m;j++)0 y% x: ^" `) E
 if (j==m-1) printf("%15.2f\n",a[i*m+j]);8 m3 Z q* b& r* @
 else printf("%15.2f",a[i*m+j]);
- K: }# n* R* N7 h: p+ D% N" P/ Y<> for(i=0;i<m;i++)
: X0 `0 O, E5 f: R {
$ S# j3 V# h2 D+ P" k for(j=0;j<n;j++)
5 K* K! z9 b2 h# i2 B& U b+=1.0/n*a[i+j*m];
% E; K1 L* l& u0 ?5 [% A# g }5 [; X k' x+ t, N7 k$ }
<>
. w1 j1 P4 Z, J5 c: K" G fclose(fa);# z6 N7 a5 `: O4 M. O1 R
<> if((fb=fopen("result.txt","w"))==NULL)* U5 k1 N# G$ V) d2 Y
 {: ^7 b# u# B5 `& U: O {
printf("Result file do not exist.\n");+ y# Y2 W; F, X: @4 @
exit(0);
- S' o$ S# o8 ] }
" e( S% T8 @) @. l/ E9 n<> else1 _0 x* ]) j3 d7 U3 O0 Z
 {
& D/ t* x8 P/ A" `, S fprintf(fb,"The average of matrix:\n");% l6 l) C# ]- [2 L. n' _8 F
fprintf(fb,"\n");- h- U$ Q5 H: c, _- z/ O
for(i=0;i<m;i++)
' R$ r+ y1 V& A% J7 J fprintf(fb,"%15.3f",b);
; {+ d, k6 C# }6 Z5 V. k$ _ fprintf(fb,"\n");& `" d& ~) q' v/ ?- b. k8 ?! Z Z
 }
5 L4 R. r, y" K# @. }' T5 W fclose(fb);
+ _! J2 ]- S2 q ~1 K4 H0 F2 o printf("Have done!The result in file:result.txt\n");
& n! I3 t; Z8 z* a5 |<>}