View Compilation Error

0_0_11499589_2591.cpp:50: error: `main' must return `int'
0_0_11499589_2591.cpp: In function `int main(...)':
0_0_11499589_2591.cpp:76: error: `prlong' undeclared (first use this function)
0_0_11499589_2591.cpp:76: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11499589_2591.cpp:76: error: expected `;' before "longf"