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fix: recognize bracket operator

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This commit is contained in:
Harsh Karande 2020-10-19 10:29:02 +05:30
parent 4f37a67cbd
commit c3142724fb
1 changed files with 32 additions and 12 deletions
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44
conversions/infix_to_postfix.c
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@ -129,7 +129,7 @@ void convert(char infix[], char postfix[])
s.tos = -1; // initalize the tos
int i, j = 0, pr;
char ch;
char ch, temp;
for (i = 0; infix[i] != '\0'; i++)
{
@ -142,20 +142,40 @@ void convert(char infix[], char postfix[])
}
else
{
while (isEmpty(s) == 0) // check if stack is empty
if (ch == '(')
{
pr = prcnd(ch, s.arr[s.tos]); // check operator precedence
if (pr == 1)
{
break; // if ch has a greater precedence than s.arr[s.tos]
}
postfix[j] = pop(&s);
j++;
push(&s, ch);
}
else
{
if (ch == ')')
{
while ((temp = pop(&s)) != '(')
{
postfix[j] = temp;
j++;
}
}
else
{
while (isEmpty(s) == 0) // check if stack is empty
{
pr = prcnd(ch,
s.arr[s.tos]); // check operator precedence
push(&s, ch); // push ch to stack
if (pr == 1)
{
break; // if ch has a greater precedence than
// s.arr[s.top]
}
postfix[j] = pop(&s);
j++;
}
push(&s, ch); // push ch to stack
}
}
}
}