blob: 9a564716c6738a99c8b4428da1f1813be7c743f5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
%{
#define YY_USER_INIT open_input_file()
extern FILE *yyin;
void open_input_file(void)
{
char *file_name,buffer[1024];
yyin = NULL;
while(yyin == NULL){
printf("Input file: ");
file_name = fgets(buffer,1024,stdin);
if(file_name){
file_name[strlen(file_name)-1] = '\0';
yyin = fopen(file_name,"r");
if(yyin == NULL){
printf("Unable to open \"%s\"\n",file_name);
}
} else {
printf("stdin\n");
yyin = stdin;
break;
}
}
}
%}
%%
|
