C语言求一个数组两两的差值

在C语言中，如果你有一个整数数组，想要计算每对相邻元素之间的差值，你可以通过遍历数组并逐个减去前一个元素来实现。这里是一个简单的示例：

#include <stdio.h>

// 定义数组和其大小
int arr[] = {5, 10, 15, 20, 25};
int n = sizeof(arr) / sizeof(arr[0]);

// 函数来计算差值并打印
void calculate_diff(int *arr, int n) {
    for (int i = 1; i < n; i++) {
        int diff = arr[i] - arr[i - 1];
        printf("Diff between %d and %d is: %d\n", arr[i - 1], arr[i], diff);
    }
}

int main() {
    calculate_diff(arr, n);
    return 0;
}

这个程序会计算数组`arr`中每个元素与其前一个元素的差，并依次打印出来。例如，对于输入{5, 10, 15, 20, 25}，它会输出：

Diff between 5 and 10 is: 5
Diff between 10 and 15 is: 5
Diff between 15 and 20 is: 5
Diff between 20 and 25 is: 5