/* Coding Challenge#4 Date-03/07/2020 Link your codes in the comments below👇 --->Task You're operating behind enemy lines, but your decryption device took a bullet and no longer operates. You need to write a code to unscramble the encrypted messages coming in from headquarters. Luckily, you remember how the encryption algorithm works. Each message you receive is a single string, with the blocks for each letter separated by a space. The blocks encoding the characters are made up of seemingly random characters and are of a variable length. For example, a two character word might look like: "x20*6 "8 9" --> "hi" Note also, if the sum of the digits goes over 26, loop back to zero (standard modulo / remainder function, such that 27 == 0, 28 == 1, etc.). As such the previous code could have also been: "x20*6 "8 36" --> "8 9" --> "hi" */ #include #include using namespace std; int main() { //input here //string str = "x20*6 vecResult; vecResult.reserve(str.length()); for(const auto& c : str) { if(isdigit(c)) { sum += c-'0'; } else if(c==' ') { if(sum!=0) vecResult.push_back(static_cast((sum%27)+96)); else vecResult.push_back(' '); sum = 0; } } if(sum!=0) vecResult.push_back(static_cast((sum%27)+96)); else vecResult.push_back(' '); for(const auto& c : vecResult) cout << c; return 0; }

challenge [Decode String]