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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);
+ M7 n3 f2 }4 \) E- f( a: K printf("%f",a);8 z: G- }4 `7 @& b2 W; i* i. O$ Z
 }
/ N% @/ f5 f1 v) O0 b% f<> for (i=0;i<n;i++)4 L/ F- p! R+ C6 E+ S O
for (j=0;j<m;j++)
* ^1 |; ?- B* t2 o* a6 O if (j==m-1) printf("%15.2f\n",a[i*m+j]);
0 F$ y% b7 |0 K1 u- Q" ]0 B! v else printf("%15.2f",a[i*m+j]);
+ i- E9 F* i6 y<> for(i=0;i<m;i++)5 ]) \- ~# c3 q0 R+ D. L; V% ?: K. ?
 {
, ]( a- V% [6 [4 e' R for(j=0;j<n;j++)5 [* O0 T1 ~, z- }, O
b+=1.0/n*a[i+j*m];9 x4 N8 k" _6 a2 }
 }
" a( L- N" X# b* Q6 s1 S<>
- I: b3 m- i3 B! S: O9 y fclose(fa);
% C/ i6 M3 }/ }* y% \<> if((fb=fopen("result.txt","w"))==NULL). z2 I9 Q# y2 X- ~$ a( S1 ?/ F
 {
( ~: D8 L; X* T# S7 g6 E# c printf("Result file do not exist.\n");
6 O; }9 ?" O0 f exit(0);
' z) r1 p o; H3 ] }
/ U/ @& m$ B2 Q6 f<> else, f; q# Q% }6 N. ?% j
 {& y* o- R7 m+ l# A) s$ n
fprintf(fb,"The average of matrix:\n");) i/ Q. e# ~6 Q* t i6 K8 Q
fprintf(fb,"\n");& z- j( m) ^& y2 B
for(i=0;i<m;i++)
8 L1 v; i, r6 ^: Y9 Q- i# V( i fprintf(fb,"%15.3f",b);
1 m8 E$ v4 M$ {% W! B3 s fprintf(fb,"\n");
2 h! X5 t. S& L) \ }
% z4 N2 F+ Q* c$ v; y fclose(fb);: j! S2 C# \" y
 printf("Have done!The result in file:result.txt\n");. n/ A$ G8 W# f6 r* j. b: E
<>}