View Compilation Error

0_0_11497230_2852.c:2:20: algorithm: No such file or directory
0_0_11497230_2852.c:4: error: syntax error before "namespace"
0_0_11497230_2852.c:5: error: syntax error before "cmp"
0_0_11497230_2852.c:5: error: syntax error before '&' token
0_0_11497230_2852.c: In function `cmp':
0_0_11497230_2852.c:7: error: `a' undeclared (first use in this function)
0_0_11497230_2852.c:7: error: (Each undeclared identifier is reported only once
0_0_11497230_2852.c:7: error: for each function it appears in.)
0_0_11497230_2852.c:7: error: `b' undeclared (first use in this function)
0_0_11497230_2852.c:8: error: `true' undeclared (first use in this function)