View Compilation Error

0_0_1846279_4425.cpp:1:17: ctype: No such file or directory
0_0_1846279_4425.cpp: In function `int main()':
0_0_1846279_4425.cpp:12: error: `isalpha' undeclared (first use this function)
0_0_1846279_4425.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1846279_4425.cpp:12: error: `toupper' undeclared (first use this function)