View Compilation Error

0_0_29038384_1448.c: In function 'main':
0_0_29038384_1448.c:20:22: error: 'tol' undeclared (first use in this function)
        printf("%d\n",tol);
                      ^
0_0_29038384_1448.c:20:22: note: each undeclared identifier is reported only once for each function it appears in
0_0_29038384_1448.c: At top level:
0_0_29038384_1448.c:23:4: error: expected identifier or '(' before 'return'
    return 0;
    ^
0_0_29038384_1448.c:24:1: error: expected identifier or '(' before '}' token
 }
 ^