check if key exists in map c++
if ( m.find("f") == m.end() ) {
// not found
} else {
// found
}check if key exists in map c++
if ( m.find("f") == m.end() ) {
// not found
} else {
// found
}check if map key has alue cpp
#include<map>
int main(){
map<int,char> m;
char ch = '!';
if (m.find(ch) != m.end()) {
std::cout << "Key found";
} else {
std::cout << "Key not found";
}
return 0;
}check if a key is in map c++
if ( m.find("f") == m.end() ) {
// not found
} else {
// found
}check if an element exists in a map c++
#include <iostream>
#include <unordered_map>
#include <algorithm>
int main()
{
std::unordered_map<char,int> m;
std::string s("abcba");
std::for_each(s.begin(), s.end(), [&m](char &c) { m[c]++; });
char ch = 's';
if (m.find(ch) != m.end()) {
std::cout << "Key found";
} else {
std::cout << "Key not found";
}
return 0;
}Copyright © 2021 Codeinu
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