Sep 10, 2024 · Sep 2, 2024 · Sep 2, 2024 · Sep 9, 2024 · Sep 9, 2024 · Sep 10, 2024
diff --git a/problems/kamacoder/0058.区间和.md b/problems/kamacoder/0058.区间和.md
Original file line number	Diff line number	Diff line change
Expand Up		@@ -264,6 +264,7 @@ if __name__ == "__main__":

		```


		### JavaScript

		``` JavaScript
Expand Down Expand Up		@@ -312,3 +313,47 @@ function prefixSum() {
		```



	### C

	```C
	#include <stdio.h>
	#include <stdlib.h>

	int main(int argc, char *argv[])
	{
	int num;
	// 读取数组长度
	scanf("%d", &num);

	// 使用动态内存分配而不是静态数组,以适应不同的输入大小
	int a = (int )malloc((num + 1) * sizeof(int));

	// 初始化前缀和数组的第一个元素为0
	a[0] = 0;

	// 读取数组元素并计算前缀和
	for (int i = 1; i <= num; i++)
	{
	int mm;
	scanf("%d", &mm);
	// 累加前缀和
	a[i] = a[i - 1] + mm;
	}

	int m, n;
	// 循环读取区间并计算区间和,直到输入结束
	// scanf()返回成功匹配和赋值的个数,到达文件末尾则返回 EOF
	while (scanf("%d%d", &m, &n) == 2)
	{
	// 输出区间和,注意区间是左闭右开,因此a[n+1]是包含n的元素的前缀和
	printf("%d\n", a[n+1] - a[m]);
	}

	// 释放之前分配的内存
	free(a);
	return 0;
	}

	```