能多举几个C语言迭代法的例子吗

1. 求阶乘：使用循环迭代计算阶乘。

#include <stdio.h>

int main() {
    int n, i, fact = 1;
    printf("Enter a positive integer: ");
    scanf("%d", &n);
    for (i = 1; i <= n; i++) {
        fact *= i;
    }
    printf("Factorial of %d is %d\n", n, fact);
    return 0;
}

2. 斐波那契数列：使用循环迭代计算斐波那契数列。

#include <stdio.h>

int main() {
    int n, i, t1 = 0, t2 = 1, nextTerm;
    printf("Enter the number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series: ");
    for (i = 1; i <= n; i++) {
        printf("%d, ", t1);
        nextTerm = t1 + t2;
        t1 = t2;
        t2 = nextTerm;
    }
    return 0;
}

3. 素数判断：使用循环迭代判断一个数是否为素数。

#include <stdio.h>

int main() {
    int n, i, flag = 0;
    printf("Enter a positive integer: ");
    scanf("%d", &n);
    for (i = 2; i <= n / 2; i++) {
        if (n % i == 0) {
            flag = 1;
            break;
        }
    }
    if (flag == 0) {
        printf("%d is a prime number\n", n);
    } else {
        printf("%d is not a prime number\n", n);
    }
    return 0;
}

4. 数组求和：使用循环迭代计算数组元素的和。

#include <stdio.h>

int main() {
    int n, i, sum = 0;
    printf("Enter the number of elements: ");
    scanf("%d", &n);
    int arr[n];
    printf("Enter %d integers:\n", n);
    for (i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
        sum += arr[i];
    }
    printf("Sum of the elements is %d\n", sum);
    return 0;
}