View Compilation Error

0_0_9021266_4088.cpp:7: error: expected primary-expression before '=' token
0_0_9021266_4088.cpp:7: error: expected primary-expression before '=' token
0_0_9021266_4088.cpp:7: error: expected primary-expression before '=' token
0_0_9021266_4088.cpp: In function `int main()':
0_0_9021266_4088.cpp:28: error: `ds' undeclared (first use this function)
0_0_9021266_4088.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9021266_4088.cpp:31: error: `A' undeclared (first use this function)
0_0_9021266_4088.cpp:31: error: `B' undeclared (first use this function)