View Compilation Error

0_0_11982653_23838.c:2:18: stack: No such file or directory
0_0_11982653_23838.c:3: error: syntax error before "namespace"
0_0_11982653_23838.c: In function `main':
0_0_11982653_23838.c:12: error: `stack' undeclared (first use in this function)
0_0_11982653_23838.c:12: error: (Each undeclared identifier is reported only once
0_0_11982653_23838.c:12: error: for each function it appears in.)
0_0_11982653_23838.c:12: error: syntax error before "char"
0_0_11982653_23838.c:13: error: `true' undeclared (first use in this function)
0_0_11982653_23838.c:18: error: `s' undeclared (first use in this function)