Show decrypted text after decryption if it's readable

main.cpp

@@ -3,8 +3,16 @@
 #include <vector>
 #include <string>
 #include <stdexcept>
+#include <algorithm>
 #include "velvet_ring.h"
 
+
+bool is_ascii(const std::string& str) {
+    return std::all_of(str.begin(), str.end(), [](unsigned char c) {
+        return std::isprint(c) || c == '\n' || c == '\r' || c == '\t';
+    });
+}
+
 using ByteVec = std::vector<unsigned char>;
 
 ByteVec read_file(const std::string path) {
@@ -106,6 +114,9 @@ int main(int argc, char* argv[]) {
             std::string dec = dec_wky(input, key);
             write_file(out, ByteVec(dec.begin(), dec.end()));
 
+            if (is_ascii(dec))
+                std::cout << dec;
+
             //std::cout << "Decrypted " << out << "\n";
         }
 
@@ -134,6 +145,10 @@ int main(int argc, char* argv[]) {
             std::string dec = dec_p(input, pass);
             write_file(out, ByteVec(dec.begin(), dec.end()));
 
+            if (is_ascii(dec)) {
+                std::cout << dec;
+            }
+            
             //std::cout << "Decrypted " << out << "\n"; // i think this is redundnant now cuz duh it better be there
         }
 
@@ -142,7 +157,7 @@ int main(int argc, char* argv[]) {
             return 1;
         }
     }
-    catch (const std::exception e) {
+    catch (const std::exception& e) {
         std::cerr << "error: " << e.what() << "\n";
         return 1;
     }