/in/foo.c: In function 'main':
/in/foo.c:10:5: warning: implicit declaration of function 'SuShu' [-Wimplicit-function-declaration]
   b=SuShu(a);
     ^~~~~
/in/foo.c: In function 'SuShu':
/in/foo.c:25:9: warning: unused variable 'j' [-Wunused-variable]
   int i,j;
         ^