C语言基础之求和

配置环境：Visual Studio Enterprise 2019

#define _CRT_SECURE_NO_WARNINGS
#include 

int sum(int i, int j)
{
	int sum = 0;
	for (int k = i; k <= j; k++)
	{
		sum += k;
	}
	return sum;
}

int main()
{
	printf("sum = %d\n", sum(1, 10) + sum(20, 30) + sum(35, 45));
	return 0;
}