View Compilation Error

0_0_9445809_8893.cpp: In function `int main()':
0_0_9445809_8893.cpp:12: error: `isupper' undeclared (first use this function)
0_0_9445809_8893.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9445809_8893.cpp:14: error: `islower' undeclared (first use this function)
0_0_9445809_8893.cpp:16: error: expected `]' before "if"
0_0_9445809_8893.cpp:16: error: expected `;' before "if"
0_0_9445809_8893.cpp:20: error: expected `}' at end of input