View Compilation Error

0_0_34950559_31255.cpp: In function 'int main()':
0_0_34950559_31255.cpp:21:18: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
        if (d[j]=="a")
                  ^
0_0_34950559_31255.cpp:23:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
        else if (d[j]=="e")
                       ^
0_0_34950559_31255.cpp:25:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     else if (d[j]=="i")
                    ^
0_0_34950559_31255.cpp:27:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     else if (d[j]=="o")
                    ^
0_0_34950559_31255.cpp:29:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     else if (d[j]=="u")
                    ^