67 lines
1.1 KiB
C++
67 lines
1.1 KiB
C++
|
#include <iostream>
|
||
|
|
#include <stack>
|
||
|
|
#include <string>
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int
|
||
|
|
main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
stack<char> s;
|
||
|
|
|
||
|
|
for (int i = 1; i < argc; i++) {
|
||
|
|
string ms(argv[i]);
|
||
|
|
bool matched = true;
|
||
|
|
|
||
|
|
for (auto c : ms) {
|
||
|
|
switch (c) {
|
||
|
|
case '{':
|
||
|
|
case '(':
|
||
|
|
case '[':
|
||
|
|
s.push(c);
|
||
|
|
break;
|
||
|
|
case '}':
|
||
|
|
if (s.top() != '{') {
|
||
|
|
cerr << "Saw '" << s.top() << "' but expected '{'." << endl;
|
||
|
|
matched = false;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
s.pop();
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case ']':
|
||
|
|
if (s.top() != '[') {
|
||
|
|
cerr << "Saw '" << s.top() << "' but expected '['." << endl;
|
||
|
|
matched = false;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
s.pop();
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case ')':
|
||
|
|
if (s.top() != '(') {
|
||
|
|
cerr << "Saw '" << s.top() << "' but expected '('." << endl;
|
||
|
|
matched = false;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
s.pop();
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
cerr << "Invalid character in string: " << c << endl;
|
||
|
|
matched = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!matched) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!matched) {
|
||
|
|
cerr << "'" << ms << "' is not a matched string." << endl;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
cout << "'" << ms << "' is a matched string." << endl;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|