compiler error message not understood

I wanted to compile the simplest program with MS Visual C++ but I keep getting the same error message no matter what I try. Here is the code I attempted to compile, build, and execute:

#include <stdio.h>
main()
{
printf("Hello World!");
return 0;
}




Here is my error message:




--------------------Configuration: test4 - Win32 Debug--------------------
Compiling...
test4.cpp
fatal error C1900: Il mismatch between 'P1' version '19991026' and 'P2' version '19970710'
Error executing cl.exe.

test4.obj - 1 error(s), 0 warning(s)


Please help me as I am getting sick of this problem!

Try deleting the output files and compile again.:confused: