07/07/19 16:01:42
>>306
#include <stdio.h>
int main(void){
double a, b, prev_a, prev_b, const_a, const_b;
int i, n;
printf("a b n : "); scanf("%lf%lf%d", &a, &b, &n);
const_a = a, const_b = b;
for(i = 1, prev_a = a, prev_b = b; i < n; i++, prev_a = a, prev_b = b){
a = prev_a*const_a - prev_b*const_b;
b = prev_a*const_b + const_a*prev_b;
}
printf("%g + %gi\n", a, b);
return 0;
}