View Compilation Error

0_0_9434678_14870.cpp: In function `int main()':
0_0_9434678_14870.cpp:14: error: `isupper' undeclared (first use this function)
0_0_9434678_14870.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9434678_14870.cpp:16: error: `islower' undeclared (first use this function)
0_0_9434678_14870.cpp:18: error: `isdigit' undeclared (first use this function)
0_0_9434678_14870.cpp:20: error: `ispunct' undeclared (first use this function)