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Another update from ingydotnet^djgoku

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Ingy döt Net 2015-11-18 06:14:39 +00:00
parent 91df62d461
commit 948b86eafa
7604 changed files with 108452 additions and 22726 deletions
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19
Task/Parsing-Shunting-yard-algorithm/Java/parsing-shunting-yard-algorithm.java
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@ -14,11 +14,16 @@ public class ShuntingYard {
Stack<Integer> s = new Stack<>();
for (String token : infix.split("\\s")) {
if (token.isEmpty())
continue;
char c = token.charAt(0);
int idx = ops.indexOf(c);
if (idx != -1 && token.length() == 1) {
// check for operator
if (idx != -1) {
if (s.isEmpty())
s.push(idx);
else {
while (!s.isEmpty()) {
int prec2 = s.peek() / 2;
@ -29,13 +34,17 @@ public class ShuntingYard {
}
s.push(idx);
}
} else if (c == '(') {
s.push(-2);
} else if (c == ')') {
}
else if (c == '(') {
s.push(-2); // -2 stands for '('
}
else if (c == ')') {
// until '(' on stack, pop operators.
while (s.peek() != -2)
sb.append(ops.charAt(s.pop())).append(' ');
s.pop();
} else {
}
else {
sb.append(token).append(' ');
}
}