View Compilation Error

0_0_1654536_5502.c:3:20: iostream: No such file or directory
0_0_1654536_5502.c:4: error: syntax error before "namespace"
0_0_1654536_5502.c: In function `main':
0_0_1654536_5502.c:79: error: `cin' undeclared (first use in this function)
0_0_1654536_5502.c:79: error: (Each undeclared identifier is reported only once
0_0_1654536_5502.c:79: error: for each function it appears in.)