View Compilation Error

824892_0_0_8624.cpp: In function `int main()':
824892_0_0_8624.cpp:79: error: `prlong' undeclared (first use this function)
824892_0_0_8624.cpp:79: error: (Each undeclared identifier is reported only once for each function it appears in.)
824892_0_0_8624.cpp:79: error: expected `;' before "longf"