View Compilation Error

164212_0_14938.c: In function `main':
164212_0_14938.c:7: error: `n' undeclared (first use in this function)
164212_0_14938.c:7: error: (Each undeclared identifier is reported only once
164212_0_14938.c:7: error: for each function it appears in.)
164212_0_14938.c:10: error: `reture0' undeclared (first use in this function)