pe3.c

C语言编程与设计也是一些文章

#include "stdio.h"
#define MAX 200
int a[MAX],cnt=0;
double pjz1=0.0,pjz2=0.0;
jsValue()
{int i,flag,m;
 for(i=0;i<MAX;i++)
   {flag=0;
    for(m=2;m<=a[i]/2;m++)
      if(a[i]%m==0) flag=1;
    if(!flag) {
        cnt++;
        pjz1+=a[i];
       }
       else  pjz2+=a[i];
   }
 pjz1/=cnt;
 pjz2/=(MAX-cnt);
 }

main()
{int i;
 if(readDat()) return;
 jsValue();
 writeDat();
}
readDat()
{FILE *fp;
 int i;
 fp=fopen("in.dat","r");
 if(!fp) return 0;
 for(i=0;i<MAX;i++) fscanf(fp,"%d,",&a[i]);
 fclose(fp);
}
writeDat()
{FILE *fp;
 int i;
 fp=fopen("out.dat","w");
 fprintf(fp,"%d\n%f\n%f\n",cnt,pjz1,pjz2);
 printf("%d\n%f\n%f\n",cnt,pjz1,pjz2);
 fclose(fp);
}