title: Unable to write to file in c
body: <p>On the 1st part i'm reading the file and then I'm trying to write data into another txt file but was unable to run the file below ... the output error as below...please let me know...appreciate it very much....</p>
  
  <pre><code>Error output:
  1&gt;------ Build started: Project: DataValidation, Configuration: Debug Win32 ------
  1&gt;  Validate.cpp
  1&gt;d:\dropbox\validate.cpp(56): error C2059: syntax error : 'if'
  1&gt;d:\dropbox\validate.cpp(56): error C2143: syntax error : missing ';' before '{'
  1&gt;d:\dropbox\validate.cpp(58): error C2181: illegal else without matching if
  1&gt;d:\dropbox\validate.cpp(67): error C2059: syntax error : 'while'
  1&gt;d:\dropbox\validate.cpp(71): error C2065: 'inFile' : undeclared identifier
  1&gt;d:\dropbox\validate.cpp(71): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
  1&gt;d:\dropbox\validate.cpp(71): error C2365: 'fclose' : redefinition; previous definition was 'function'
  1&gt;          c:\program files (x86)\microsoft visual studio 12.0\vc\include\stdio.h(184) : see declaration of 'fclose'
  1&gt;d:\dropbox\validate.cpp(73): error C2059: syntax error : 'return'
  1&gt;d:\dropbox\validate.cpp(74): error C2059: syntax error : '}'
  1&gt;d:\dropbox\validate.cpp(74): error C2143: syntax error : missing ';' before '}'
  ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
  </code></pre>
  
  <hr>
  
  <pre><code>#define _CRT_SECURE_NO_WARNINGS
  
  #include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt; //for exit (1)
  
  int main(){
  FILE* inFile;   //file handle or pointer
  FILE* outFile;
  char there_was_error = 0;
  char opened_in_read = 1;
  char filename[100];
  char line[100]; //buffer
  char test;
  int src, dest, type, port;
  char data[100];
  
  printf("Enter filename: ");
  scanf("%s", filename);
  
  printf("Processing filename %s ...\n", filename);
  inFile = fopen(filename, "r");
  if (inFile == NULL) {       //check if file handler is invalid
      printf("Could not open file %s\n", filename);
      exit(1);    //error status code
  }
  
  //test = fscanf(inFile, "%d:%d:%d:%d:", &amp;src, &amp;dest, &amp;type, &amp;port); //read line from file
  //fgets(data, 100, inFile);
  do {
      test = fscanf(inFile, "%d:%d:%d:%d:", &amp;src, &amp;dest, &amp;type, &amp;port);//read line from file
      fgets(data, 100, inFile);
      //printf("%d %d %d %d %s", src, dest, type, port, data);
  
      outFile = fopen("data_1.txt", "rb+");
      if (outFile == NULL)
      {
          opened_in_read = 0;
          outFile = fopen("data_1.txt", "wb");
          if (outFile == NULL)
              there_was_error = 1;
      }
      if (there_was_error)
      {
          printf("Disc full or no permission\n");
          return EXIT_FAILURE;
      }
      if (opened_in_read)
          printf("The file is opened in read mode."
          " Let's read some cached data\n");
      else
          printf("%d %d %d %d %s", src, dest, type, port, data);
      return EXIT_SUCCESS;
  }
  
  
      if (src &gt;= 1 &amp;&amp; src &lt;= 1024){
      }
      else {
  
      }
      if (dest &gt;= 1 &amp;&amp; dest &lt;= 1024){
      }
      else {
  
      }
  
  } while (test != EOF);
  
  
  
  fclose(inFile); //must always close file once done
  
  return 0;
  }
  </code></pre>