syntax error : 'switch'

#include main() { int s,t,m; printf(input s\n); scanf(%d,&s); t = (int) (s/10); switch(t){ case 10:m=5;break; case 9:m=4;break; case 8:m=3;break; case 7:m=2;break; case 6:m=1;break; default:m=0; break; } printf(m=%d\n,m); return 0; }