View Compilation Error

0_0_37198423_14752.cpp: In function 'int main()':
0_0_37198423_14752.cpp:23:13: error: request for member 'a' in 's', which is of non-class type 'city [105]'
    cin >> s.a >> s.b;
             ^
0_0_37198423_14752.cpp:23:20: error: request for member 'b' in 's', which is of non-class type 'city [105]'
    cin >> s.a >> s.b;
                    ^
0_0_37198423_14752.cpp:24:4: error: 'c' was not declared in this scope
    c = abs(a - b);
    ^
0_0_37198423_14752.cpp:24:12: error: 'a' was not declared in this scope
    c = abs(a - b);
            ^
0_0_37198423_14752.cpp:24:16: error: 'b' was not declared in this scope
    c = abs(a - b);
                ^
0_0_37198423_14752.cpp:26:8: error: 'x' was not declared in this scope
   sort(x,x+n,cmp);
        ^
0_0_37198423_14752.cpp:26:17: error: 'sort' was not declared in this scope
   sort(x,x+n,cmp);
                 ^