execute binary machine code from C

Question

following this instructions I have managed to produce only 528 bytes in size a.out (when gcc main.c gave me 8539 bytes big file initially).

main.c was:

Answer 1

The point is that DEP protection is enabled! you can goto Configurations -> Linker -> Advance -> DEP turn off , it's ok now .

void main（）{
int i = 11;
//The following is the method to generate the machine code directly!
//mov eax, 1; ret;
const char *code = "\xB8\x10\x00\x00\x00\xc3";
    __asm call code;  //test successful~..vs 2017
    __asm mov i ,eax;
printf("i=%d", i);
}