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| #include <ctype.h>
#include <stdio.h>
#include <string.h>
int i, j;
int len;
int count;
int start_p;
int analyse(char *tmp, int start_p, FILE *fp_w)
{
while( isspace(tmp[start_p]) )
start_p++;
if( isalpha(tmp[start_p]) )
{
count = 0;
char tmp_str[1000] = {};
while( isalpha(tmp[start_p]) )
{
tmp_str[count] = tmp[start_p];
count++;
start_p++;
}
start_p--;
if( is_keyword(tmp_str, fp_w) ){
;
}
else
{
printf("<0, %s>\n", tmp_str);
fprintf(fp_w, "<0, %s>\n", tmp_str);
}
}
else{
if( isdigit(tmp[start_p]) )
{
count = 0;
char tmp_str[1000] = {};
while( isdigit(tmp[start_p]) )
{
tmp_str[count] = tmp[start_p];
count++;
start_p++;
}
start_p--;
printf("<1, %s>\n", tmp_str);
fprintf(fp_w, "<1, %s>\n", tmp_str);
}
else{
if( !isalpha(tmp[start_p]) && !isdigit(tmp[start_p]) )
{
count = 0;
char tmp_str[1000] = {};
if( !isalpha(tmp[start_p+1]) && !isdigit(tmp[start_p+1]) )
{
tmp_str[count] = tmp[start_p];
count++; start_p++;
tmp_str[count] = tmp[start_p];
if( is_symbol(tmp_str, fp_w) ){
;
}else{
count--; start_p--;
tmp_str[1] = '\0';
tmp_str[count] = tmp[start_p];
is_symbol(tmp_str, fp_w);
}
}else{
tmp_str[count] = tmp[start_p];
is_symbol(tmp_str, fp_w);
}
}
}
}
len = strlen(tmp);
if( start_p == len )
return 1;
else
analyse(tmp, start_p+1, fp_w);
}
int is_keyword(char *tmp, FILE *fp_w){
char *keyword[] = {
"main", "void", "int", "float", "char", "double", "for",
"if", "else", "while", "do", "break", "switch", "case",
"struct", "typedef", "char", "return", "continue", "sizeof"
};
for (i = 0; i < 20; ++i)
{
if( strcmp( tmp, keyword[i]) == 0 )
{
printf("<%d, %s>\n", i+2, tmp);
fprintf(fp_w, "<%d, %s>\n", i+2, tmp);
return 1;
}
}
return 0;
}
int is_symbol(char *tmp, FILE *fp_w){
char *symbol[] = {
"+", "-", "*", "/", "<", ">", "=", "!", "&", "|",
"\\", "#", "\"", "%", "^",
"++", "+=", "--", "-=", "*=", "/=", "%=", "&=", "^=", "|=",
"<=", ">=", "==", "!=", "&&", "||", ">>", "<<", "?:", "->",
"{", "}", "(", ")", "[", "]", ",", ";", ":", "."
};
for (i = 0; i < 45; ++i)
if( strcmp( tmp, symbol[i]) == 0 )
{
printf("<%d, %s>\n", 22 + i, tmp);
fprintf(fp_w, "<%d, %s>\n", 22 + i, tmp);
return 1;
}
return 0;
}
int is_blankline(char *tmp){
int i;
int len = strlen(tmp);
for (i = 0; i < len; ++i)
{
if( !isspace(tmp[i]) )
return 0;
}
return 1;
}
int delete_comments(char *tmp)
{
len = strlen(tmp);
for(i = 0; i < len; i++)
{
if(tmp[i] == '/' && tmp[i+1] == '/')
{
tmp[i] = '\0';
}
}
}
int main(int argc, char const *argv[])
{
char tmp[100] = "";
char str[100] = "";
int flag = 0;
FILE *fp, *fp_tmp;
fp = fopen("test.c", "r");
fp_tmp = fopen("tmp.c", "w");
while(fgets(str, 100, fp) != NULL)
{
for(i = 0; i < 100; i++)
{
if(str[i] == '/' && str[i+1] == '/')
{
str[i] = '\n';
str[i+1] = '\0';
}
if(str[i] == '/' && str[i+1] == '*')
{
str[i] = '\0';
flag = 1;
fputs(str, fp_tmp);
}
if(str[i] == '*' && str[i+1] == '/')
{
for (j = 0; j < 100; ++j)
{
str[j] = str[j+i+2];
}
str[j] = '\0';
flag = 0;
}
}
if( flag == 0 )
fputs(str, fp_tmp);
}
fcloseall();
FILE *fp_new;
FILE *fp_w;
fp_new = fopen("tmp.c", "r");
fp_w = fopen("Lex_Result.txt", "w");
while(!feof(fp_new)){
if(fgets(tmp, 100, fp_new))
if( is_blankline(tmp) == 0)
analyse(tmp, 0, fp_w);
}
fcloseall();
remove("tmp.c");
return 0;
}
|