// 递归调用的辗除法,求两个整数的最大公约数
int gcd3(int a,int b){
printf("递归调用的辗除法,求两个整数的最大公约数gcd3(),a=%d,b=%d\n",a,b);
// 不用比较a,b大小，如果b>a, a%b=a,第二次调用，自然将a,b调换，即大数a,小数b
if (b==0) return a;
else return gcd3(b,a%b);
}
int main () {
printf("iterative sum of squares from 1 to 10: %d\n",
summation(square, 1, 10));
printf("recursive gcd of 24 and 40: %d\n", gcd(24, 40));
printf("recursive sum of squares from 1 to 10: %d\n",
summation2(square, 1, 10));
printf("iterative gcd of 24 and 40: %d\n", gcd2(24, 40));
printf("tail-recursive gcd of 24 and 40: %d\n", gcd3(24, 40));
}
void ch1()
{
// 循环语句的辗除法,求两个整数的最大公约数
printf("319,377最大公约数：%d\n",gcd1(319,377)); //29
// 循环语句的辗除法,求两个整数的最大公约数
printf("319,377最大公约数：%d\n",gcd2(319,377)); //29
// 递归调用的辗除法,求两个整数的最大公约数
printf("377,319最大公约数：%d\n",gcd3(377,319)); //29
printf("319,377最大公约数：%d\n",gcd3(319,377)); //29
printf("377,319最大公约数：%d\n",gcd4(377,319)); //29
printf("319,377最大公约数：%d\n",gcd4(319,377)); //29
printf("377,319最大公约数：%d\n",gcd5(377,319)); //29
printf("319,377最大公约数：%d\n",gcd5(319,377)); //29
// 最小公倍数=两整数的乘积÷最大公约数
//printf("319,377最小公倍数：%d\n",multiple (319,377));
}