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Day-263.cpp
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Day-263.cpp
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// i can't represent last terminal_character on my terminal
#include <iostream>
#include <functional>
#include <set>
using namespace std;
set<char> terminal {'.', '?', '!'};
set<char> seperator {',', ';', ':'};
bool valid(string &s, int index = 0) {// checking until first terminal character appears
// (This is a Valid string. Here, it is again!)
// first word needs to be a title
if(index == s.size()) {
return true;
}
if(!isupper(s[index])) {
return false;
}
++index;
while (index < (int)s.size() && s[index]!=' ') {
if (isupper(s[index])) {
return false;
}
if(terminal.find(s[index]) != terminal.end()) {
if (index-1<0 || (!isalpha(s[index-1]))){
return false;
}
if(index+1 < s.size()) {
if (s[index+1] != ' ') {
return false;
}
} else {
return true;
}
return valid(s , index+2);
}
if(seperator.find(s[index]) != seperator.end()) {
if (index-1<0 || (!isalpha(s[index-1]))){
return false;
}
if (index+1 < s.size() && s[index+1]!=' ') {
return false;
}else if (index +1 == s.size()) {
return false;
}
}
++index;
}
++index;
while (index < (int)s.size()) {
if (terminal.find(s[index]) != terminal.end()) {
if (index-1<0 || (!isalpha(s[index-1]))){
return false;
}
if(index+1 < s.size()) {
if (s[index+1] != ' ') {
return false;
}
} else {
return true;
}
return valid(s , index+2);
}
if(seperator.find(s[index]) != seperator.end()) {
if (index-1<0 || (!isalpha(s[index-1]))){
return false;
}
if (index+1 < s.size() && s[index+1]!=' ') {
return false;
}else if (index +1 == s.size()) {
return false;
}
}
int counter{};
while (index<s.size() && s[index]==' ') {
++counter;
++index;
}
if(counter >=2 ) {
return false;
}
if (isupper(s[index])){
return false;
}
index++;
}
return true;
}
int main(void){
string s;
getline(cin,s);
if (valid(s)) {
cout << "Valid" << '\n';
} else {
cout << "Invalid" << '\n';
}
return 0;
}