View Compilation Error

0_0_4735434_14379.cpp: In function `void getPrim()':
0_0_4735434_14379.cpp:5: error: `sum' undeclared (first use this function)
0_0_4735434_14379.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4735434_14379.cpp:5: error: `memset' undeclared (first use this function)
0_0_4735434_14379.cpp:6: error: `v' undeclared (first use this function)
0_0_4735434_14379.cpp:7: error: `Maxn' undeclared (first use this function)
0_0_4735434_14379.cpp:15: error: `prim' undeclared (first use this function)