/in/foo.c: In function 'main':
/in/foo.c:28:12: warning: format '%c' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
   printf("%c",sum%11+48);
            ^
/in/foo.c:6:14: warning: unused variable 'ch' [-Wunused-variable]
  char s[200],ch;
              ^~
/in/foo.c:5:27: warning: unused variable 'm' [-Wunused-variable]
  long int i=0,j=0,sum=0,t,m;
                           ^