View Compilation Error

0_0_6108884_16114.cpp: In function `int main()':
0_0_6108884_16114.cpp:39: error: `prlong' undeclared (first use this function)
0_0_6108884_16114.cpp:39: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6108884_16114.cpp:39: error: expected `;' before "longf"