--------------------Configuration: PROG - Win32 Debug--------------------
Compiling...
PROG.C
C:\WEXAM\00000000\PROG.C(21) : warning C4013: 'isprime' undefined; assuming extern returning int
Linking...
PROG.OBJ : error LNK2001: unresolved external symbol _isprime
Debug/PROG.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

PROG.exe - 2 error(s), 1 warning(s)
----------------------------------------------------------------------------------------------------------
#include<stdio.h>
int cnt,sum;
void writeDAT();

int isPrime(int number)
{
 int i,tag=1;
 if(number==1)
    return 0;
 for(i=2;tag && i<=number/2;i++)
     if(number % i==0) tag=0;
 return tag;
}

void countValue()
{
    int i;
    cnt=0;
    sum=0;
    for(i=2;i<90;i++)
        if(isPrime(i)&&isPrime(i+4)&&isPrime(i+10))
        {
            cnt++;
            sum+=i;
        }
}

void main()
{
  cnt=sum=0;
  countValue();
  printf("满足条件的整数的个数=%d\n",cnt);
  printf("满足条件的整数的和值=%d\n",sum);
  writeDAT();
}

void writeDAT()
{
  FILE *fp;
  fp=fopen("out91.dat","w");
  fprintf(fp,"%d\n%d\n",cnt,sum);
  fclose(fp);
}
弄好了，谢版主， 呵呵！

[[it] 本帖最后由 wangyidj05 于 2008-4-11 12:41 编辑 [/it]]

c语言对大小写敏感,请注意

哦了 弄好了 谢拉！