字符串匹配,但是无法输入子串,请问问题出在哪里?
程序代码：#include<stdio.h>
#include<malloc.h>
#include<string.h>
#define string_size 10000
int T_len;
int S_len;
typedef struct LinkSeq
{
char str[string_size];
int length;
}Seq;
int intgNum = 0,charNum = 0,blankNum = 0;
void Statistics(Seq Essay)
{
int j=0;
while(Essay.str[j]!='\0')
{ if( ('A'<=Essay.str[j]&&Essay.str[j]<='Z') || ('a'<=Essay.str[j]&&Essay.str[j]<='z'))
charNum ++;
else if( '0'<=Essay.str[j]&&Essay.str[j]<='9')
{
puts("its a integer!");
getch();
intgNum ++;
}
else if(Essay.str[j]==' ')
{
puts("its a blank space!");
getch();
blankNum ++;
}
}
}
void GetNext(char T[],int *next)
{
int i,j;
i = 1;
j = 0;
next[1] = 0;
while(i < T_len)
{
if(j==0 || T[i] == T[j])
{
++i;
++j;
next[i] = j;
}
else
j = next[j];
}
}
int Index_KMP(char S[],char T[],int pos)
{
int i = pos;
int j = 1;
int next[255];
GetNext(T,next);
while(i <= S_len && j <= T_len)
{
if(j==0 || S[i] == T[j])
{
++i;
++j;
}
else
j = next[j];
}
pos = i;
if(j > T_len)
return i-T_len;
else
return 0;
}
void SubStrFreq(Seq Essay,char T[])
{
//int times = 0;
int startLoc;
startLoc = Index_KMP(Essay.str,T,0);
printf("we find the substr at %d \n",startLoc);
//return times;
}
/*
void DelSubStr(Seq Essay)
{
} */
void main()
{
int i,j,row,N_line;
Seq Essay;
char subStr[string_size];
FILE *fp;
if( (fp=fopen("A.txt","r")) == NULL)
{
puts("Cannot open the file!");
getch();
exit(0);
}
printf("please input lines of the essay: ");
scanf("%d",&N_line);
for(row=1,j=0; row<N_line; row++)
for(i=0; i<80; i++,j++)
{
Essay.str[j] = fgetc(fp);
putchar(Essay.str[j]);
}
Essay.str[j++] = '\0';
Essay.length = j; // 记录字符总数
// printf("\nthe total number of character is %d:\nthe total number of blank space is %d:\nthe total number of words is %d:\n",charNum,blankNum,Essay.length);
printf("please input the string you search:");
gets(subStr); //这句无法执行
T_len = strlen(subStr);
S_len = strlen(Essay.str);
SubStrFreq(Essay,subStr);
getch();
fclose(fp);
}
A.rar
(3.82 KB)
