1_pro.c

来自「C源代码 计算机等级考试C语言上机题」· C语言 代码 · 共 56 行

#include  <stdio.h>
#include  <string.h>
#include  <conio.h>
#define  N  81
int findStr(char *str,char *substr)
{
  int  n=0;
  char  *p , *r;
  while ( *str )
  {
    p=str;r=substr;
    while(*r)
    {  
      if(*r==*p)  {  r++;  p++;  }
      else  break;
    }
    if(*r=='\0')  n++;
    str++;
  }
  return  n;
}
main()
{
  char str[81],substr[3];
  int n;
  clrscr();
  printf("Enter a string : "); gets(str);
  printf("Enter a substring: "); gets(substr);
  puts(str);puts(substr);
  n=findStr(str,substr);
  printf("n=%d\n",n);
  ReadWrite();
}
ReadWrite()
{   
  char str[81],substr[6],ch;
  int n,len,i=0;
  FILE *rf, *wf ;
  rf = fopen("IN90.DAT", "r") ;
  wf = fopen("OUT90.DAT", "w") ;
  while(i<5)
  {
    fgets(str,80,rf);
    fgets(substr,10,rf);
    len=strlen(substr)-1;
    ch=substr[len];
    if(ch=='\n'||ch==0x1a) substr[len]=0;
    substr[2]=0; 
    n=findStr(str,substr);
    fprintf(wf,"%d\n",n);
    i++;  
  }
  fclose(rf);
  fclose(wf);  
}