Eclipse C/C function 'printf' could not be resolved

Question

I\'m trying to set up a C/C++ development environment on Eclipse.

I installed the following Eclipse plugins:

• C/C++ development tools SDK
• Library A

Answer 1

You must include

C:\MinGW\include 

to the include directory for using C functions.

Answer 2

You must include <stdio.h> above your main(). This should solve it:

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

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Sometimes, Eclipse's parser gets stupid. You can try reparsing the project. Right click on your project then → Index → Rebuild. After rebuild, most likely the symbols will be recognized.