View Compilation Error

0_0_2006574_22037.cpp: In function `int prime(int)':
0_0_2006574_22037.cpp:35: error: `mod' undeclared (first use this function)
0_0_2006574_22037.cpp:35: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2006574_22037.cpp: In function `int mod(int, int, int)':
0_0_2006574_22037.cpp:45: error: `int mod(int, int, int)' used prior to declaration
0_0_2006574_22037.cpp:53: error: `qmod' undeclared (first use this function)
0_0_2006574_22037.cpp: In function `int qmod(int, int, int)':
0_0_2006574_22037.cpp:62: error: `int qmod(int, int, int)' used prior to declaration