# include<stdio.h>

# include<stdlib.h>

# include<string.h>

int panduan(char tmp[])

{

char b[6][10] = {"begin", "if", "then", "while", "do", "end", };

int k = 0;

while(k < 6) // 临时变量tmp 与 字符串b[k] 进行比较

{

if(strcmp(tmp, b[k]) == 0)

{

printf("<%s, %d>\n", tmp, k+1);

return 0;

}

k++;

}

printf("<%s, 10>\n", tmp);

return 0;

}

void cifafenxi(char a[])

{

int i = 0, j = 0;

char tmp[10];

int flag = 0;

while(a[i] != '\0')

{

if(a[i] >= 'a' && a[i] <= 'z') // 判断标识符

{

tmp[j] = a[i];

j++;

while((a[i+1] >= 'a' && a[i+1] <= 'z') || (a[i+1] >= '0' && a[i+1] <= '9'))

{

i++;

tmp[j] = a[i];

j++;

}

tmp[j] = '\0';

j = panduan(tmp);

}

if(a[i] >= '0' && a[i] <= '9') // 判断数字

{

tmp[j] = a[i];

j++;

while(a[i+1] >= '0' && a[i+1] <= '9')

{

i++;

tmp[j] = a[i];

j++;

}

tmp[j] = '\0';

printf("<%s, 11>\n", tmp);

j = 0;

}

switch(a[i]) // 判断符号

{

case '+':printf("<+, 13>\n");break;

case '-':printf("<-, 14>\n");break;

case '*':printf("<*, 15>\n");break;

case '/':printf("</, 16>\n");break;

case ':':

{

if(a[i+1] == '=')

printf("<:=, 18>\n");

else

printf("<:, 17>\n");

}break;

case '<':

{

if(a[i+1] == '=')

printf("<<=, 21>\n");

else if(a[i+1] == '>')

printf("<<>, 22>\n");

else

printf("<<, 20>\n");

}break;

case '>':

{

if(a[i+1] == '=')

printf("<>=, 24>\n");

else

printf("<>, 23>\n");

}break;

case '=':printf("<=, 25>\n");break;

case ';':printf("<;, 26>\n");break;

case '(':printf("<(, 27>\n");break;

case ')':printf("<), 28>\n");break;

case '#':printf("<#, 0>\n");break;

}

i++;

}

}

int main(void)

{

char a[300];

printf("input : ");

gets(a);

cifafenxi(a);

return 0;

}