prog.cpp: In function 'int main()':
prog.cpp:6:2: error: expected ',' or ';' before 'b'
b = a * 51;
^
prog.cpp:7:2: error: 'c' was not declared in this scope
c = (a<<5)+(a<<4)+(a<<1)+(a);
^
prog.cpp:9:8: error: 'b' was not declared in this scope
cout<<b;
^