View Compilation Error

541377_0_0_16666.cpp:30: error: `main' must return `int'
541377_0_0_16666.cpp: In function `int main(...)':
541377_0_0_16666.cpp:38: error: `qsort' undeclared (first use this function)
541377_0_0_16666.cpp:38: error: (Each undeclared identifier is reported only once for each function it appears in.)