1_pro.c

C源代码 计算机等级考试C语言上机题

#include  <stdio.h>
int  b[3];
void jsvalue()
{
  int a1=1,a2=1,n=1,an;
  int sum0,sum;
  sum0=a1+a2;
  while(1)
  {
    an=a1+a2*2;
    sum=sum0+an;
    a1=a2; a2=an; n++;
    if(sum0<100&&sum>=100)  b[0]=n;
    if(sum0<1000&&sum>=1000)  b[1]=n;
    if(sum0<10000&&sum>=10000)  { b[2]=n; break; }
    sum0=sum;
  }
}
main()
{
  jsvalue();
  printf("M=100,n=%d\nM=1000,n=%d\nM=10000,n=%d\n",b[0],b[1],b[2]); 
  writeDat();
}
writeDat()
{
  FILE *fp;
  fp=fopen("OUT98.DAT","w");
  fprintf(fp,"%d\n%d\n%d\n",b[0],b[1],b[2]);
  fclose(fp);
}