Weird Syntax Error In C in If-else - c

Question

I was programming an apache module. In the middle of the programming, I was opening a file, but I got an error while compiling.
32. static int wqb_handler(request_rec* req){
33. // Open and read our requested file
34. const char* p_file = req->filename;
35.
36. FILE* req_file;
37. if((req_file = fopen(p_file,"r"))==NULL){
38. return HTTP_NOT_FOUND;
39. }else{
40. fclose(req_file);
41. }
42. // Required variables
43. const char* content_type_a = "text/html";
44.
45. // Set Headers
46. ap_set_content_type(req,content_type_a);
47. if(req->header_only){
48. return OK;
49. }
50.
51.
52. return OK;
53. }
The problem is in that function, I was checking that was the problem, and I think the problem is the if-else statement, the code is written in C, not in C++.
These are the errors:
C:/wqb/wqb1_apache2.c(43) : error C2143: syntax error : missing ';' in front of 'const'
C:/wqb/wqb1_apache2.c(46) : error C2065: 'content_type_a' : undeclarated identifier

Answer 1

If this is C, and you're not compiling in C99 mode (i.e. with a C89 compiler), remember that all declarations must be directly following the start of a block.
Mixing declarations and code is a C99 feature imported from C++.
It appears you are compiling with a Micrososft Visual Studio Compiler in C mode. Note that William H. Gates III chose to ignore C99 entirely and refuses to update the C implemenation for the third millennium. :-)

Answer 2

Share with the solution of your problem. It will help the others to understand it more quickly.
Improve your knowledge about operators and comments.
You're writing too many unnecessary { and } in the operators.
For example, your code:
for( i = 0; i < N; i++ )
{
printf("Hello");
}
More simple/clear code:
for( i = 0; i < N; i++ )
printf("Hello");
...........................................................................
Your code (original) may look so (It's easier to read and understand.):
static int wqb_handler(request_rec* req)
{
/* Open and read our requested file */
const char* p_file = req -> filename;
FILE* req_file;
if((req_file = fopen(p_file,"r"))==NULL)
return HTTP_NOT_FOUND;
else
fclose(req_file);
/* Required variables */
const char* content_type_a = "text/html";
/* Set Headers */
ap_set_content_type(req,content_type_a);
if(req->header_only)
return 0;
return OK;
}