Question

2.1 Specification Write an ANSI-C program that reads input from the standard input, which contains two integers representing a base b and power p, and then calculates bP After reading base and power from the user, the program first calls the math library function pow (), and then call function my_pow (), which is a recursive function that you are going to implement here. The program keeps on prompting user and terminates when user enters 100 for base (followed by any number for power) 2.2 Implementation Download file 1lab4pow.cand start from there Your function my_pow (double, double) should be RECURSIVE, not ITERATIVE. That is, the function should be implemented using RECURSION, not loops. In a recursive solution, the function calls itself with different (usually smaller) inputs, until a base case is reached. Note that although the function's parameters are of type double, the actual arguments to the function are assumed to be two integer literals (i.e. the power will not be 3.5). However, the power can be negative. You functions should handle this

#include <stdio.h>

..

int main(int argc, char *argv[])
{
        
   int base, power;  
   printf("enter base and power: ");
   scanf("%d %d", &base, &power);

   while (base != -100){
        double res = pow(base, power);
        double res2 = my_pow(base, power);
        printf("pow:    %.4f\n", res);
        printf("my_pow: %.4f\n", res2);


         ....


    }
        
    return 0;
}

// this function should be RECURSIVE
// should not use any loop here
double my_pow(double base, double p)
{

}

lab4pow.c file contains:

Answer 1

Below is my code to solve your problem. I have checked outputs on all the given inputs, and everything is working fine. I have attached the screenshot of code below. If you are satisfied with the answer please like.

CODE:

############################

#include <stdio.h>
#include <math.h>

// this function should be RECURSIVE
// should not use any loop here
double my_pow(int base, int p)
{
if(p<0) return 1.0/my_pow(base, -1*p);
if(p==1) return base;
  
double val = my_pow(base, p/2);
if(p%2==1) {
return val*val*base;
} else {
return val*val;
}
}

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

printf("enter base and power: ");
scanf("%d %d", &base, &power);

while (base != -100){
double res = pow(base, power);
double res2 = my_pow(base, power);
printf("pow: %.4f\n", res);
printf("my_pow: %.4f\n", res2);
  
printf("enter base and power: ");
scanf("%d %d", &base, &power);

}
  
return 0;
}

#############################

OUTPUT:

enter base and power: 10 2 100.0000 pow: my pow: 100.0000 enter base and power: 10 4 pow: 10000.0000 my_pow: 10000.0000 enter base and power: 2 3 8.0000 pow: my pow: 8.0000 enter base and power: 2 5 32.0000 pow: my pow: 32.0000 enter base and power: -2 4 16.0000 pow: my pow: 16.0000 enter base and power: -2 5 -32.0000 pow: my pow: -32.0000 enter base and power: 2 -3 0.1250 pow: my pow: 0.1250 enter base and power: 2 -5 0.0312 pow: my pow: 0.0312 enter base and power: -2 -6 pow: 0.0156 my pow: 0.0156 enter base and power: -2 -5 -0.0312 pow: my pow: -0.0312 enter base and power: -100 4 .. . Program finished with exit code 0 Press ENTER to exit console.