need help adding error code to my program when inserting the wrong string

[uneven spindle]

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[drifting saffron]

You're doing basically nothing that's in that assignment

It asks you to write a program that translates a single character, not a string. And it says you should use a switch statement to translate the letters, not some ascii values math.

[versed narwhal]

#include <iostream>
using namespace std;

int main()
{
char ch;
cout << "Enter a letter (A - Z): ";
cin >> ch;
if (ch >= 'a' && ch <= 'z') {
ch = ch - 'a' + 'A';
}

[versed narwhal]

cout << "ROT13 Caesar Cipher for " << ch << " - > ";
switch (ch) {
case 'A':
cout << 'N' << endl;
break;
case 'B':
cout << 'O' << endl;
break;
case 'C':
cout << 'P' << endl;
break;
case 'D':
cout << 'Q' << endl;
break;
case 'E':
cout << 'R' << endl;
break;
case 'F':
cout << 'S' << endl;
break;
case 'G':
cout << 'T' << endl;
break;
case 'H':
cout << 'U' << endl;
break;
case 'I':
cout << 'V' << endl;
break;
case 'J':
cout << 'W' << endl;
break;
case 'K':
cout << 'X' << endl;
break;
case 'L':
cout << 'Y' << endl;
break;
case 'M':
cout << 'Z' << endl;
break;
case 'N':
cout << 'A' << endl;
break;
case 'O':
cout << 'B' << endl;
break;
case 'P':
cout << 'C' << endl;
break;
case 'Q':
cout << 'D' << endl;
break;
case 'R':
cout << 'E' << endl;
break;
case 'S':
cout << 'F' << endl;
break;
case 'T':
cout << 'G' << endl;
break;
case 'U':
cout << 'H' << endl;
break;
case 'V':
cout << 'I' << endl;
break;
case 'W':
cout << 'J' << endl;
break;
case 'X':
cout << 'K' << endl;
break;
case 'Y':
cout << 'L' << endl;
break;
case 'Z':
cout << 'M' << endl;
break;
}
return 0;
}

[versed narwhal]

I believe I change it to a swtich now, but still don't know how to include an error incase they don't insert a letter

[drifting saffron]

Just use a default case to print the error

The assignment also said nothing about converting lowercase to uppercase, no idea why you're adding all these things

int main()
{
    char input, ouput;
    // request input char

    switch (input)
    {
    case 'A':
        output = 'N';
        break;
    // .. etc
    default:
        // print error message
        return 0;
    }

    // print conversion message
    return 0;
}

That should really be all you need to do

[versed narwhal]

Ohhh okay

[uneven spindle]

@versed narwhal

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[versed narwhal]

!solved