View Compilation Error

0_0_35129680_18732.cpp: In function 'int read()':
0_0_35129680_18732.cpp:12:5: error: 'll' was not declared in this scope
     ll x = 0, f =  1;
     ^
0_0_35129680_18732.cpp:13:48: error: 'f' was not declared in this scope
     while(ch < '0' || ch > '9') {if(ch == '-') f = -1; ch = getchar();}
                                                ^
0_0_35129680_18732.cpp:14:35: error: 'x' was not declared in this scope
     while('0' <= ch && ch <= '9') x = x*10 + ch - '0', ch = getchar();
                                   ^
0_0_35129680_18732.cpp:15:12: error: 'x' was not declared in this scope
     return x*f;
            ^
0_0_35129680_18732.cpp:15:14: error: 'f' was not declared in this scope
     return x*f;
              ^