View Compilation Error

0_0_8075312_20085.cpp:1:17: stdio: No such file or directory
0_0_8075312_20085.cpp: In function `int mai()':
0_0_8075312_20085.cpp:19: error: `sort' undeclared (first use this function)
0_0_8075312_20085.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)