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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);4 D) q0 @; w% H% {% s5 `6 p
printf("%f",a);; i7 ^! N) g' i! W
 }6 z/ F5 A$ x4 e% {1 f
<> for (i=0;i<n;i++)
; \7 s3 x" |; f+ v4 q, _9 y for (j=0;j<m;j++)" j. i @4 y+ X
 if (j==m-1) printf("%15.2f\n",a[i*m+j]);
3 w/ j4 i9 ^+ R2 w1 `5 D! W7 a5 q( I else printf("%15.2f",a[i*m+j]);, C0 M8 m0 W: d r! H
<> for(i=0;i<m;i++); ~. w3 s6 ^: `1 T6 q! ^/ K8 q( C
 {
1 N0 r5 C- Z; y: @0 F n4 { for(j=0;j<n;j++)
4 D5 ]& Z u0 }4 ]5 ?! B b+=1.0/n*a[i+j*m];
) m/ d% [, s! V, _ }0 n8 j5 X1 q0 P' {* B( m
<>, ?& p4 B2 N6 ]0 d6 [7 R
 fclose(fa);
8 w2 V5 b! k# `9 p, ?<> if((fb=fopen("result.txt","w"))==NULL)2 |5 V1 q0 r% w3 o
 {; I! ^7 d- U/ T/ C7 S2 F) s
printf("Result file do not exist.\n");/ X4 e! h# i9 N4 x
exit(0);! B( ]1 D t, s# [5 Z1 E2 y" {
 }
4 f5 d7 S9 b* X+ a2 z- K8 V<> else8 w, F4 N. m/ _# [. F* l$ s
 {3 Z) e! Z/ s0 Q- s
fprintf(fb,"The average of matrix:\n");
6 |" P( k, J7 Y+ f fprintf(fb,"\n");0 J* [8 r7 z6 _. z
for(i=0;i<m;i++)
$ ?' N! @8 Y8 U7 [+ ? fprintf(fb,"%15.3f",b);+ b7 y3 W7 D3 {$ j8 ^
fprintf(fb,"\n");
8 B/ D0 h! v, q* T2 L }, }0 N0 e7 Q. i# y' z& L& k% |/ K
 fclose(fb);5 e2 e/ t1 \2 b5 M; I6 y
 printf("Have done!The result in file:result.txt\n");
* S* \# U% ]- ^& a0 ~& a; J5 k# i<>}