View Compilation Error

0_0_4028763_7272.cpp: In function `int main()':
0_0_4028763_7272.cpp:18: error: `strupr' undeclared (first use this function)
0_0_4028763_7272.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4028763_7272.cpp:33: error: `itoa' undeclared (first use this function)