View Compilation Error

0_0_11818004_26403.cpp: In function `int main()':
0_0_11818004_26403.cpp:6: error: expected init-declarator before "scanf"
0_0_11818004_26403.cpp:6: error: expected `,' or `;' before "scanf"
0_0_11818004_26403.cpp:7: error: `b' undeclared (first use this function)
0_0_11818004_26403.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11818004_26403.cpp:9: error: expected `;' before '}' token