C/C++の宿題片付けます 126代目

C/C++の宿題片付けま� ..

74:デフォルトの名無しさん
09/05/21 23:28:59
>>63
#include <stdio.h>
#include <math.h>

int fac(int i) { return i == 1 ? 1 : i * fac(i-1); }
double mypow(double x, int n) { return n == 0 ? 1 : x * mypow(x, n-1); }
double sine(double x)
{
int i, flg = 1;
double ret = 0;
for(i=0; i<5; i++, flg *= -1) ret += mypow(x, i*2+1) / fac(i*2+1) * flg;
return ret;
}

int main(void)
{
int i;

puts("+----------+----------+----------+----------+----------+");
puts("|x(degree) |x(radian) | sine(x) | sin(x) | dif |");
puts("+----------+----------+----------+----------+----------+");
for(i=0; i<=360; i+=15) {
double r = i * M_PI / 180;
double s1 = sine(r), s2 = sin(r);
printf("|%-10d|%8.4f |%8.4f |%8.4f |%8.4f |\n", i, r, s1, s2, fabs(s1-s2));
}
puts("+----------+----------+----------+----------+----------+");
return 0;
}

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