54、请编制程序，从文件in.dat中读取200个整数至数组xx中，求出奇数的个数cnt1和偶
void read_dat(int xx[N])
{
int i,j;
FILE *fp;
fp=fopen("in.dat","r");
for(i=0;i<20;i++)
{for(j=0;j<10;j++)
{fscanf(fp,"%d,",&xx[i*10+j]);
printf("%d ",xx[i*10+j]);
}
printf("\n");
}
fclose(fp);
}
void main()
{
int cnt1,cnt2,xx[N];
float pj;
FILE *fw;
clrscr();
fw=fopen("out.dat","w");
read_dat(xx);
printf("\n\ncnt1=%d,cnt2=%d,pj=%6.2f\n",cnt1,cnt2,pj);
fprintf(fw,"%d\n%d\n%6.2f\n",cnt1,cnt2,pj);
fclose(fw);
}
/* 注：已是很简单了吧！*/
void main()
{
int cnt1,cnt2,xx[N];
float pj;
FILE *fw;
int i;
clrscr();
fw=fopen("out.dat","w");
read_dat(xx);
cnt1=cnt2=0;
pj=0.0;
for(i=0;i<N;i++)
if(xx[i]%2) cnt1++;
else {cnt2++;pj+=xx[i];}
pj=(float)((long)(pj*100/cnt2))/100;
printf("\n\ncnt1=%d,cnt2=%d,pj=%6.2f\n",cnt1,cnt2,pj);
fprintf(fw,"%d\n%d\n%6.2f\n",cnt1,cnt2,pj);
fclose(fw);
}