View Compilation Error

0_0_11953014_11633.cpp: In function `int main()':
0_0_11953014_11633.cpp:4: error: `A' does not name a type
0_0_11953014_11633.cpp:8: error: `A' undeclared (first use this function)
0_0_11953014_11633.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11953014_11633.cpp:9: error: expected primary-expression before '<=' token
0_0_11953014_11633.cpp:9: error: `B' undeclared (first use this function)
0_0_11953014_11633.cpp:10: error: expected primary-expression before '<=' token
0_0_11953014_11633.cpp:10: error: `C' undeclared (first use this function)
0_0_11953014_11633.cpp:11: error: expected primary-expression before '<=' token
0_0_11953014_11633.cpp:11: error: `D' undeclared (first use this function)
0_0_11953014_11633.cpp:12: error: `E' undeclared (first use this function)