View Compilation Error

0_0_37482922_31310.cpp: In function 'int main()':
0_0_37482922_31310.cpp:49:16: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    if(oper[0]=="E") break;
                ^
0_0_37482922_31310.cpp:51:16: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    if(oper[0]=="Q") printf("%d\n",Query(a,b,1,N,1));
                ^
0_0_37482922_31310.cpp:52:21: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    else if(oper[0]=="A") Update(1,N,a,b,1,1);
                     ^
0_0_37482922_31310.cpp:53:21: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    else if(oper[0]=="S") Update(1,N,a,b,1,-1);
                     ^