sibsutis/proglabs/lab7/8.c

#include <stdio.h>
double power(double n, int р);

int main(void){
    double x, xpow;
    int exp;

    printf("Write: num pow\t(q for exit)\nWrite: ") ;

    while (scanf(" %lf %d", &x, &exp) == 2){
        xpow = power(x,exp);
        if (xpow != 0){
            printf ("%.2lf в степени %d равно %lf\n", x, exp, xpow);}
        printf("Write: ");
    }
    return 0;
}

double power (double n, int p){
    if ((p == 0)&&(n == 0)){
        printf("Result of 0 in pow 0 is undefind\n");
        return 0;
    }

    if ((p == 0)||(n == 0)){
        return 1;
    }

    if (p>0){
        double pow = 1;
        int i;
        for (i =1; i <= p; i++)
            pow *= n;
        return pow;
    }

    if (p<0){
        double pow = 1;
        int i;
        for (i =1; i <= -p; i++)
            pow *= n;
        pow = (1 / pow);
 
        return pow;
    }
}