C++ Decypher message

How to Add the following 22 decryptions by looping through the cipherV vector, Instead of coding 22 more branch statements.

The complete list of cipher and normal characters to decrypt a message:

‘!’ > ‘a’ ‘^’ >’b’ ‘&’ >’c’ ‘*’ >’d’ ‘@’ >’e’ ‘(‘ > ‘f’ ‘)’ > ‘g’ ”-” > ‘h’ ‘#’ > ‘i’ ‘_’ > ‘j’ ‘=’ > ‘k’ ‘+’ > ‘l’ ‘[‘ > ‘m’

‘{‘ > ‘n’ ‘$’ > ‘o’ ‘]’ > ‘p’ ‘}’ > ‘q’ ‘;’ > ‘r’ ‘:’ > ‘s’ ‘,’ > ‘t’ ‘%’ > ‘u’ ‘<‘ > ‘v’ ‘.’ > ‘w’ ‘>’ > ‘x’ ‘/’ > ‘y’ ‘?’ > ‘z’

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
vector<char> normalV(26);
vector<char> cipherV(26);
string toDec = “”;
string beenDec = “”;

normalV.at(0) = ‘n’; cipherV.at(0) = ‘{‘;

// Get secret message
do {
cout << “Enter a secret message: “;
getline(cin, toDec);
} while (toDec.length() == 0);

beenDec = toDec;

// Decrypt secret message
if (toDec.at(0) == cipherV.at(0)) {
beenDec.at(0) = normalV.at(0);
}

cout << “Decrypted message: ” << beenDec << endl;

return 0;
}