About c++ plzzzz helppppppp.?

how do you write 3.00 * 10 to the power of 8 in c++? i think it is 3.00* double pow10(int x) and x = 8.but its not working. plzz help thx.

About c++ plzzzz helppppppp.?
double temp = 3.0e8;
Reply:#include %26lt;iostream%26gt;


#include %26lt;cmath%26gt;





using namespace std;





int


main(int argc,char *argv[]){


// If you do not want output in exponential form


// double double res=0;


long double res=0.0;


long double val=30.0;


res = pow(val,8);


cout %26lt;%26lt; res %26lt;%26lt; endl;


return(0);


}