二分-D - Can you solve this equation?

D - Can you solve this equation?

Now,given the equation 8*x^4 + 7*x^3 + 2*x^2 + 3*x + 6 == Y,can you find its solution between 0 and 100;
Now please try your lucky.

InputThe first line of the input contains an integer T(1<=T<=100) which means the number of test cases. Then T lines follow, each line has a real number Y (fabs(Y) <= 1e10);OutputFor each test case, you should just output one real number(accurate up to 4 decimal places),which is the solution of the equation,or “No solution!”,if there is no solution for the equation between 0 and 100.Sample Input

2
100
-4

Sample Output

1.6152
No solution!

 #include<iostream>
 #include<cmath>
 using namespace std;
 
 double f(double x){
     return (*pow(x,) + *pow(x,) + *pow(x,) + *x + );
 }
 
 int main()
 {
     int t;
     double m,n;
     scanf("%d",&t);
     while(t--){
         scanf("%lf",&m);
         if(f()>m||f()<m){
             printf("No solution!\n");
             continue;
         }
         double left = , right = , mid;
         while(fabs(f(mid)-m) > 1e-){
             mid=(left + right)/;
             if((f(mid) > m))     right = mid;
              else if(f(mid)<m)     left=mid;
         }
         printf("%.4lf\n",mid);
     }
     return ;
 }