View Compilation Error

0_0_9961384_10300.cpp: In function `int main()':
0_0_9961384_10300.cpp:5: error: invalid conversion from `int' to `const char*'
0_0_9961384_10300.cpp:5: error:   initializing argument 1 of `int scanf(const char*, ...)'
0_0_9961384_10300.cpp:11: error: `b' undeclared (first use this function)
0_0_9961384_10300.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)