#include<bits/stdc++.h>
using namespace std;
// A utility function to check
// whether a password is valid or not
bool isValid(string password)
{
// For checking if password length
// is between 8 and 15
if (!((password.length() >= 8) &&
(password.length() <= 15)))
return false;
// To check space
if (password.find(" ") !=
std::string::npos)
return false;
if (true)
{
int count = 0;
// Check digits from 0 to 9
for(int i = 0; i <= 9; i++)
{
// To convert int to string
string str1 = to_string(i);
if (password.find(str1) !=
std::string::npos)
count = 1;
}
if (count == 0)
return false;
}
// For special characters
if (!((password.find("@") != std::string::npos) ||
(password.find("#") != std::string::npos) ||
(password.find("!") != std::string::npos) ||
(password.find("~") != std::string::npos) ||
(password.find("$") != std::string::npos) ||
(password.find("%") != std::string::npos) ||
(password.find("^") != std::string::npos) ||
(password.find("&") != std::string::npos) ||
(password.find("*") != std::string::npos) ||
(password.find("(") != std::string::npos) ||
(password.find(")") != std::string::npos) ||
(password.find("-") != std::string::npos) ||
(password.find("+") != std::string::npos) ||
(password.find("/") != std::string::npos) ||
(password.find(":") != std::string::npos) ||
(password.find(".") != std::string::npos) ||
(password.find(",") != std::string::npos) ||
(password.find("<") != std::string::npos) ||
(password.find(">") != std::string::npos) ||
(password.find("?") != std::string::npos) ||
(password.find("|") != std::string::npos)))
return false;
if (true)
{
int count = 0;
// Checking capital letters
for(int i = 65; i <= 90; i++)
{
// Type casting
char c = (char)i;
string str1(1, c);
if (password.find(str1) !=
std::string::npos)
count = 1;
}
if (count == 0)
return false;
}
if (true)
{
int count = 0;
// Checking small letters
for(int i = 90; i <= 122; i++)
{
// Type casting
char c = (char)i;
string str1(1, c);
if (password.find(str1) !=
std::string::npos)
count = 1;
}
if (count == 0)
return false;
}
// If all conditions fails
return true;
}
// Driver code
int main()
{
string password1 = "GeeksForGeeks";
if (isValid(password1))
cout << "Valid Password" << endl;
else
cout << "Invalid Password" << endl;
string password2 = "Geek$ForGeeks7";
if (isValid(password2))
cout << "Valid Password" << endl;
else
cout << "Invalid Password" << endl;
} Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!
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C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
//code
}
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You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression){
case value1:
// code
break; // optional
case value2:
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break; // optional
......
default:
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For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
//code
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While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
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Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}