Main.cc:1:24: warning: extra tokens at end of #include directive
#include;
^
Main.cc: In function 'int main()':
Main.cc:7:27: error: invalid operands of types 'double' and 'double' to binary 'operator^'
printf(".5lf",a*x^3+b*x^2+c*x+d);
^
Main.cc:7:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
printf(".5lf",a*x^3+b*x^2+c*x+d);
^