Problems with running C code in Visual Studio Express 2012 [closed] - c

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I installed VS Express 2012 to learn C language in my University. I create new empty project then add new item to Source Files folder and change Source.cpp to Source.c
"Hello World" runs without problems but when I write simple "for" loop like this:
#include <stdio.h>
#include <stdlib.h>
int main() {
for (int i = 0; i <= 6; i++)
{
printf("the i value is: %d\n", i);
}
getchar();
return (0);
}
It writes me lots of errors:
------ Build started: Project: cTest, Configuration: Debug Win32 ------
Source.c
e:\ctest\source.c(7): error C2143: syntax error : missing ';' before 'type'
e:\ctest\source.c(7): error C2143: syntax error : missing ')' before 'type'
e:\ctest\source.c(7): error C2065: 'i' : undeclared identifier
e:\ctest\source.c(7): warning C4552: '<=' : operator has no effect; expected operator with side-effect
e:\ctest\source.c(7): error C2059: syntax error : ')'
e:\ctest\source.c(8): error C2143: syntax error : missing ';' before '{'
e:\ctest\source.c(9): error C2065: 'i' : undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Please help me solve this problem.

Answer 1

Shown in IdeOne,
error: ‘for’ loop initial declarations are only allowed in C99 mode
note: use option -std=c99 or -std=gnu99 to compile your code
I think, this clears your doubt. Declare i at the beginning of the function.
The correct code would be like this at WorkingExample.
From C99 Wiki, this is a new feature that was not available earlier.
Intermingled declarations and code: variable declaration is no longer
restricted to file scope or the start of a compound statement (block),
similar to C++
About VC++ compiler, direct from Mr. Herb Stutter's mouth,
Implements Standard C90 exactly (using /TC or naming files as
something.c)

Answer 2

This happens because your code does not obey to the current C standard under which you compile the code. Declaring int i for loop is allowed in C99 standard. Compile with -std=c99.