View Compilation Error

291600_0_19455.cpp: In function `int main()':
291600_0_19455.cpp:12: error: invalid conversion from `const char*' to `char'
291600_0_19455.cpp:15: error: `k' undeclared (first use this function)
291600_0_19455.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
291600_0_19455.cpp:16: error: ISO C++ forbids comparison between pointer and integer
291600_0_19455.cpp:17: error: ISO C++ forbids comparison between pointer and integer