completely changed the ch15 code

src/15/Challenge/ch15_json.cpp

@@ -10,30 +10,38 @@
 #include <iostream>
 #include <fstream>
 #include <string>
+#include <stack>
 
-// JSON File Validation, main()
-// Summary: This application checks the balance of braces, brackets, and quotes in a JSON file.
-int main(){ 
+// is_valid_JSON()
+// Summary: This function returns true if the file in the argument is a valid JSON file based on its balance of braces, brackets, and quotes.
+// Arguments:
+//           filename: A string with the name of the file to open.
+// Returns: An integer enconding: 1 for valid JSON files, 0 for invalid, and -1 on failure to open file. 
+int is_valid_JSON(std::string filename){
     std::string line;
-    int braces=0, brackets=0, quotes=0; // Counters
-
-    std::fstream file ("jason.json", std::ios::in);
-    if(file.is_open()){
+    bool quotes = false; 
 
+    std::fstream file (filename, std::ios::in);
+    if(file.is_open()){
+
         // Write your code here
 
         file.close();
     }
-    else{
-        std::cout << "Something went wrong\n\n";
-        return 1;
-    }
-
-    // Final verdict.
-    if(brackets==0 && braces==0 && quotes==0)
-        std::cout << "The file is valid!\n\n";
     else
-        std::cout << "The file is invalid!\n\n";
+        return -1;
+}
+
+// JSON File Validation, main()
+int main(){
+    int x = is_valid_JSON("jason.json");
+
+    if(x == 1)
+        std::cout << "The JSON file is valid!\n\n";
+    else if(x == 0)
+        std::cout << "The JSON file is invalid!\n\n";
+    else
+        std::cout << "Could not open the file!\n\n";  
     std::cout << std::flush;
     return 0;
 }

src/15/Challenge/jason.json

@@ -20,7 +20,7 @@
                 "$gcc"
             ],
             "group": "build",
-            "detail": "compiler: \"C:\\Program Files\\mingw-w64\\x86_64-8.1.0-win32-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe\"",
+            "detail": "compiler: C:\\Program Files\\mingw-w64\\x86_64-8.1.0-win32-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
             "presentation":{
                 "reveal": "always",
                 "focus": true

src/15/Solution/ch15_json.cpp

@@ -10,55 +10,66 @@
 #include <iostream>
 #include <fstream>
 #include <string>
+#include <stack>
 
-// JSON File Validation, main()
-// Summary: This application checks the balance of braces, brackets, and quotes in a JSON file.
- int main(){ 
+// is_valid_JSON()
+// Summary: This function returns true if the file in the argument is a valid JSON file based on its balance of braces, brackets, and quotes.
+// Arguments:
+//           filename: A string with the name of the file to open.
+// Returns: An integer enconding: 1 for valid JSON files, 0 for invalid, and -1 on failure to open file. 
+int is_valid_JSON(std::string filename){
     std::string line;
-    int braces=0, brackets=0, quotes=0; // Counters
-    
-    std::fstream file ("jason.json", std::ios::in);
+    bool quotes = false; 
+
+    std::fstream file (filename, std::ios::in);
     if(file.is_open()){
-        while(std::getline(file, line)){
-            for (auto &ch : line){
-                if(quotes==0)  // Content outside quotes.
+        std::stack<char> stack;
+        while(std::getline(file, line))
+            for(auto &ch : line)
+                if(!quotes)  // Content outside quotes.
                     switch(ch){
                         case '{':
-                            braces++;
-                            break;
-                        case '}':
-                            braces--;
-                            break;
                         case '[':
-                            brackets++;
+                            stack.push(ch);
                             break;
+                        case '}':
                         case ']':
-                            brackets--;
+                            if(stack.empty()){
+                                file.close();
+                                return 0;
+                            }
+                            if(stack.top() == (ch - 2))
+                                stack.pop();
+                            else
+                                return 0;
                             break;
                         case '"':
-                            quotes++;
+                            quotes = true;
                             break;
-                    }             
+                    }        
                 else   // Ignore everything inside quotes.
                     if(ch=='"')
-                        quotes--;
-
-                if(braces<0 || brackets<0) // Invalidate if brackets are ever negative.
-                    braces = -1000000;
-            }
-        }
+                        quotes = false;
         file.close();
+        if(stack.empty() && !quotes)
+            return 1;
+        else 
+            return 0;
     }
-    else{
-        std::cout << "Something went wrong\n\n";
-        return 1;
-    }
+    else
+        return -1;
+}
+
+// JSON File Validation, main()
+int main(){
+    int x = is_valid_JSON("jason.json");
 
-    // Final verdict.
-    if(brackets==0 && braces==0 && quotes==0)
-        std::cout << "The file is valid!\n\n";
+    if(x == 1)
+        std::cout << "The JSON file is valid!\n\n";
+    else if(x == 0)
+        std::cout << "The JSON file is invalid!\n\n";
     else
-        std::cout << "The file is invalid!\n\n";
+        std::cout << "Could not open the file!\n\n"; 
     std::cout << std::flush;
     return 0;
 }

src/15/Solution/jason.json

@@ -20,7 +20,7 @@
                 "$gcc"
             ],
             "group": "build",
-            "detail": "compiler: \"C:\\Program Files\\mingw-w64\\x86_64-8.1.0-win32-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe\"",
+            "detail": "compiler: C:\\Program Files\\mingw-w64\\x86_64-8.1.0-win32-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
             "presentation":{
                 "reveal": "always",
                 "focus": true