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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);
6 V* ]7 r" h2 K! i k6 L; G" k: ` printf("%f",a);" {- Q9 N% E n6 V- v
 }6 N. Q0 C9 c" n4 }
<> for (i=0;i<n;i++)4 R2 V8 l- d# u- K) C
for (j=0;j<m;j++)
! }3 d! g! ?8 @- z/ W3 M if (j==m-1) printf("%15.2f\n",a[i*m+j]);7 d, V J c6 V+ x" w: W
 else printf("%15.2f",a[i*m+j]);
7 {$ D# L3 M- B6 A+ p. o" t0 Z3 C<> for(i=0;i<m;i++)" M J) U: J x$ W. H/ S: v7 W" X9 W2 T
 {
# O& ^, X v+ t; T( k for(j=0;j<n;j++)
, U/ d* F! R O) v b+=1.0/n*a[i+j*m];3 a& J: N$ H4 Y9 d; e4 t; \
 }+ S7 E' |/ o& T
<>7 I( a9 j2 a$ f" B( K3 g* f) @, B
 fclose(fa);. k7 A" P1 Z" j$ G- ]+ e
<> if((fb=fopen("result.txt","w"))==NULL)6 k7 D- _& y4 o
 {
4 u3 ]! W5 d2 N$ y printf("Result file do not exist.\n");/ Y9 ~9 `' U; L o5 P# ~
exit(0);
0 l! X7 e/ t, S/ |6 Y: w9 o2 h# l }
! M3 Z9 Q c: f$ `4 S! {<> else& J3 i4 a/ H# Y/ E2 \
 {+ B6 F4 [) r9 [* U4 E* ~1 @
fprintf(fb,"The average of matrix:\n");
4 b; C% Z9 p- b% L% c* B1 g/ E fprintf(fb,"\n");
, a' b0 ]& G ?5 G0 X for(i=0;i<m;i++)0 x9 }( B' T' W. n+ d3 `2 m
fprintf(fb,"%15.3f",b);
' ?2 H9 k+ {, S9 k8 m' r b; U5 U- G fprintf(fb,"\n");
: |: a& E. \, n" l2 ^: B v1 f }
" }2 i, ?3 \. @3 |! d6 }9 G fclose(fb);
4 j: m$ u! r ~! P# W/ }4 _ printf("Have done!The result in file:result.txt\n");
<>}