View Compilation Error

87640_0_30259.cpp: In function `int main()':
87640_0_30259.cpp:9: error: expected init-declarator before "int"
87640_0_30259.cpp:9: error: expected `,' or `;' before "int"
87640_0_30259.cpp:20: error: `b' undeclared (first use this function)
87640_0_30259.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
87640_0_30259.cpp:29: error: `c' undeclared (first use this function)
87640_0_30259.cpp:29: error: `d' undeclared (first use this function)