/in/foo.c: In function 'cal':
/in/foo.c:5:5: error: expected '(' before '{' token
     {
     ^
/in/foo.c:6:9: error: unknown type name 'mov'
         mov eax,a;
         ^~~
/in/foo.c:7:9: error: unknown type name 'mov'
         mov ebx,b;
         ^~~
/in/foo.c:8:9: error: unknown type name 'add'
         add eax,ebx;
         ^~~
/in/foo.c:8:13: error: redeclaration of 'eax' with no linkage
         add eax,ebx;
             ^~~
/in/foo.c:6:13: note: previous declaration of 'eax' was here
         mov eax,a;
             ^~~
/in/foo.c:8:17: error: redeclaration of 'ebx' with no linkage
         add eax,ebx;
                 ^~~
/in/foo.c:7:13: note: previous declaration of 'ebx' was here
         mov ebx,b;
             ^~~
/in/foo.c:8:17: warning: unused variable 'ebx' [-Wunused-variable]
         add eax,ebx;
                 ^~~
/in/foo.c:8:13: warning: unused variable 'eax' [-Wunused-variable]
         add eax,ebx;
             ^~~
/in/foo.c:7:17: warning: unused variable 'b' [-Wunused-variable]
         mov ebx,b;
                 ^
/in/foo.c:6:17: warning: unused variable 'a' [-Wunused-variable]
         mov eax,a;
                 ^
/in/foo.c:10:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^