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Added for and while loops #8

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Added for and while loops #8

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28 changes: 26 additions & 2 deletions compiler.l
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,18 @@ digit [0-9]
"int" {return INT;}
"float" {return FLOAT;}
"else" {return ELSE;}
"while" {
lvl++;
FILE *fptr = fopen("if_lvl.txt", "w");
fprintf(fptr,"%d", lvl);
fclose(fptr);
return WHILE;}
"endwhile" {
lvl--;
FILE *fptr = fopen("if_lvl.txt", "w");
fprintf(fptr,"%d", lvl);
fclose(fptr);
return ENDWHILE;}
"endif" {
lvl--;
FILE *fptr = fopen("if_lvl.txt", "w");
Expand All @@ -32,11 +44,23 @@ digit [0-9]
fprintf(fptr,"%d", lvl);
fclose(fptr);
return IF;}
"endfor" {return ENDFOR;}
"end" {return END;}
"for" {return FOR;}
"for" {
lvl++;
FILE *fptr = fopen("if_lvl.txt", "w");
fprintf(fptr,"%d", lvl);
fclose(fptr);
return FOR;
}
"in" {return IN;}
"range" {return RANGE;}
"endfor" {
lvl--;
FILE *fptr = fopen("if_lvl.txt", "w");
fprintf(fptr,"%d", lvl);
fclose(fptr);
return ENDFOR;}

"start" {return START;}
{digit}+"."{digit}+ {return FLOAT_DIGIT;}
{digit}+ {return DIGIT;}
Expand Down
24 changes: 14 additions & 10 deletions compiler.y
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@



%token DIGIT PRINT ID IF ENDIF ELSE START END TAB IN RANGE FOR ENDFOR FLOAT_DIGIT NL FLOAT INT
%token DIGIT PRINT ID IF ENDIF ELSE START END TAB IN RANGE FOR ENDFOR FLOAT_DIGIT NL FLOAT INT WHILE ENDWHILE


%left '+' '-'
Expand Down Expand Up @@ -55,11 +55,15 @@ stmt: assignment newline
|PRINT '(' expr ')' newline stmt
|PRINT '(' ID ')' newline
|PRINT '(' ID ')' newline stmt
|IF '(' COND ')' newline stmt else ENDIF newline stmt{}
| WHILE '(' COND ')' newline stmt ENDWHILE newline stmt
| WHILE '(' COND ')' newline stmt ENDWHILE newline
|IF '(' COND ')' newline stmt else ENDIF newline stmt
|IF '(' COND ')' newline stmt else ENDIF newline
|IF '(' COND ')' newline stmt ENDIF newline stmt{}
|IF '(' COND ')' newline stmt ENDIF newline
|assignment newline stmt
|IF '(' COND ')' newline stmt ENDIF newline stmt
|IF '(' COND ')' newline stmt ENDIF newline
| FOR ID IN RANGE DIGIT newline stmt ENDFOR newline
| FOR ID IN RANGE DIGIT newline stmt ENDFOR newline stmt
|assignment newline stmt
| assign newline stmt
| assign newline
;
Expand All @@ -71,7 +75,7 @@ newline: NL newline
|NL

COND: DIGIT
| var '<' var
| var '<' var
| var '>' var
| var '<''=' var
| var '>''=' var
Expand Down Expand Up @@ -164,7 +168,7 @@ int main()
{
FILE *fptr = fopen("if_lvl.txt", "w");
fprintf(fptr, "0");
fclose(fptr);
fclose(fptr);
yyparse();

return 1;
Expand Down Expand Up @@ -192,7 +196,7 @@ int insert(int x)
}
}
int lvl_check()
{
{
int lvl;
FILE *fptr = fopen("if_lvl.txt", "r");
char ch = fgetc(fptr);
Expand Down Expand Up @@ -226,7 +230,7 @@ void IntDeclared(int flag)
}
}
}

if(declared==0)
{
printf("Declare before assigning a value\n");
Expand Down Expand Up @@ -259,4 +263,4 @@ void FloatDeclared(int flag)
}
if(declared==0)
printf("Declare before assigning a value\n");
}
}