bai1.c

#include<stdio.h>
#include<conio.h>
main()
{
	int n;
	int tong=0;
	printf("nhap vao so phan tu cua mang:");
	scanf("%d",&n);
	int mang[n];
	for(int i =0; i<n; i++){
		printf("nhap vao phan tu thu %d :", i+1);
		scanf("%d",&mang[i]);
	}
	for(int i =0; i<n; i++){
		if(mang[i]<0)
		printf("%d",mang[i]);
		if(mang[i]%2 ==0)
		tong = tong+mang[i];
	}
	printf("\ntong cac so chan la: %d",tong);
}