View Compilation Error

0_0_10551915_15018.c:1:19: iostream: No such file or directory
0_0_10551915_15018.c:3:16: cmath: No such file or directory
0_0_10551915_15018.c:5: error: syntax error before "namespace"
0_0_10551915_15018.c: In function `dfs':
0_0_10551915_15018.c:14: error: syntax error before '/' token
0_0_10551915_15018.c:20: error: `cout' undeclared (first use in this function)
0_0_10551915_15018.c:20: error: (Each undeclared identifier is reported only once
0_0_10551915_15018.c:20: error: for each function it appears in.)
0_0_10551915_15018.c:20: error: `endl' undeclared (first use in this function)
0_0_10551915_15018.c: In function `main':
0_0_10551915_15018.c:48: error: `cin' undeclared (first use in this function)
0_0_10551915_15018.c:64: error: `cout' undeclared (first use in this function)
0_0_10551915_15018.c:64: error: `endl' undeclared (first use in this function)