以下是针对您提到的四个问题的C语言实现代码:
1. **卡布列克常数6174验证**:
#include <stdio.h>
#include <stdlib.h>
int compare_desc(const void *a, const void *b) {
return (*(int *)b - *(int *)a);
}
int compare_asc(const void *a, const void *b) {
return (*(int *)a - *(int *)b);
}
int kaprekar_step(int num) {
int digits[4] = {num / 1000, (num / 100) % 10, (num / 10) % 10, num % 10};
qsort(digits, 4, sizeof(int), compare_desc);
int desc = digits[0] * 1000 + digits[1] * 100 + digits[2] * 10 + digits[3];
qsort(digits, 4, sizeof(int), compare_asc);
int asc = digits[0] * 1000 + digits[1] * 100 + digits[2] * 10 + digits[3];
return desc - asc;
}
void kaprekar_test() {
for (int i = 1000; i < 10000; i++) {
int num = i;
int steps = 0;
while (num != 6174 && steps < 10) {
num = kaprekar_step(num);
steps++;
}
if (num == 6174) {
printf("Number %d reaches 6174 in %d steps.
", i, steps);
}
}
}
2. **蒙特卡洛算法**:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void monte_carlo_pi(int iterations) {
int inside_circle = 0;
for (int i = 0; i < iterations; i++) {
double x = (double)rand() / RAND_MAX;
double y = (double)rand() / RAND_MAX;
if (x * x + y * y <= 1) {
inside_circle++;
}
}
double pi_estimate = (double)inside_circle / iterations * 4;
printf("Estimated Pi: %f
", pi_estimate);
}
3. **冰雹猜想验证(验证范围1~100)**:
#include <stdio.h>
void collatz_test() {
for (int i = 1; i <= 100; i++) {
int num = i;
printf("Collatz sequence for %d: ", i);
while (num != 1) {
printf("%d ", num);
if (num % 2 == 0) {
num /= 2;
} else {
num = num * 3 + 1;
}
}
printf("1
");
}
}
4. **亲和数验证(验证范围1~10000)**:
#include <stdio.h>
int sum_of_divisors(int num) {
int sum = 0;
for (int i = 1; i <= num / 2; i++) {
if (num % i == 0) {
sum += i;
}
}
return sum;
}
void amicable_numbers_test() {
for (int i = 1; i <= 10000; i++) {
int sum1 = sum_of_divisors(i);
if (sum1 > i && sum1 <= 10000) {
int sum2 = sum_of_divisors(sum1);
if (sum2 == i) {
printf("Amicable pair: %d and %d
", i, sum1);
}
}
}
}
这些代码片段分别实现了卡布列克常数验证、蒙特卡洛算法、冰雹猜想验证和亲和数验证。您可以将这些函数集成到一个C程序中进行测试。
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