/in/foo.c: In function 'main':
/in/foo.c:5:5: warning: statement with no effect [-Wunused-value]
     printf a,b;
     ^~~~~~
/in/foo.c:5:12: error: expected ';' before 'a'
     printf a,b;
            ^
/in/foo.c:6:8: warning: missing terminating " character
  scanf("%f %f ,&a,&b);
        ^
/in/foo.c:6:8: error: missing terminating " character
  scanf("%f %f ,&a,&b);
        ^~~~~~~~~~~~~~~
/in/foo.c:7:5: error: expected expression before 'if'
     if(a<b)
     ^~
/in/foo.c:16:1: error: expected ';' before '}' token
 }
 ^