View Compilation Error

0_0_7920224_12760.c:1:20: iostream: No such file or directory
0_0_7920224_12760.c:2:19: fstream: No such file or directory
0_0_7920224_12760.c:4:21: algorithm: No such file or directory
0_0_7920224_12760.c:5: error: syntax error before "namespace"
0_0_7920224_12760.c:8: error: syntax error before "n"
0_0_7920224_12760.c:8: error: variable-size type declared outside of any function
0_0_7920224_12760.c: In function `main':
0_0_7920224_12760.c:15: error: `cin' undeclared (first use in this function)
0_0_7920224_12760.c:15: error: (Each undeclared identifier is reported only once
0_0_7920224_12760.c:15: error: for each function it appears in.)
0_0_7920224_12760.c:21: error: `cout' undeclared (first use in this function)
0_0_7920224_12760.c:21: error: `endl' undeclared (first use in this function)