View Compilation Error

0_0_1593505_22534.cpp:14: error: `cstruct' does not name a type
0_0_1593505_22534.cpp:20: error: expected constructor, destructor, or type conversion before ';' token
0_0_1593505_22534.cpp: In function `int main()':
0_0_1593505_22534.cpp:34: error: `r' undeclared (first use this function)
0_0_1593505_22534.cpp:34: error: (Each undeclared identifier is reported only once for each function it appears in.)