/in/foo.c: In function 'main':
/in/foo.c:12:14: error: 'th' undeclared (first use in this function)
    else if(t-th=1){
              ^
/in/foo.c:12:14: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:22:4: error: expected '}' before 'else'
    else if (s-s1>=120 && t-t1>=7){
    ^
/in/foo.c: At top level:
/in/foo.c:34:5: error: expected identifier or '(' before 'if'
     if (s1>=s)
     ^
/in/foo.c:36:5: error: expected identifier or '(' before 'else'
     else
     ^
/in/foo.c:38:1: error: expected identifier or '(' before '}' token
 }
 ^
/in/foo.c:40:3: error: expected identifier or '(' before '}' token
   }
   ^
/in/foo.c:41:3: error: expected identifier or '(' before '}' token
   }
   ^
/in/foo.c:42:1: error: expected identifier or '(' before 'return'
 return 0;
 ^
/in/foo.c:43:1: error: expected identifier or '(' before '}' token
 }
 ^