View Compilation Error

0_0_35826073_13255.cpp: In function 'int main()':
0_0_35826073_13255.cpp:45:20: error: 'E' was not declared in this scope
    scanf("%d%d%d",&E[i].x,&E[i].y,&E[i].z);
                    ^
0_0_35826073_13255.cpp:47:8: error: 'E' was not declared in this scope
   sort(E,E+m,cmp);
        ^