View Compilation Error

0_0_4851082_12883.c:3:19: iostream: No such file or directory
0_0_4851082_12883.c:4:20: algorithm: No such file or directory
0_0_4851082_12883.c:5: error: syntax error before "namespace"
0_0_4851082_12883.c:42: error: syntax error before "cmp"
0_0_4851082_12883.c:42: error: syntax error before "a"
0_0_4851082_12883.c: In function `cmp':
0_0_4851082_12883.c:44: error: `a' undeclared (first use in this function)
0_0_4851082_12883.c:44: error: (Each undeclared identifier is reported only once
0_0_4851082_12883.c:44: error: for each function it appears in.)
0_0_4851082_12883.c:44: error: `b' undeclared (first use in this function)