View Compilation Error

0_0_35329471_30223.cpp: In function 'int read()':
0_0_35329471_30223.cpp:7:5: error: 'll' was not declared in this scope
     ll x = 0, f =  1;
     ^
0_0_35329471_30223.cpp:8:48: error: 'f' was not declared in this scope
     while(ch < '0' || ch > '9') {if(ch == '-') f = -1; ch = getchar();}
                                                ^
0_0_35329471_30223.cpp:10:14: error: 'f' was not declared in this scope
     return x*f;
              ^