求过程怎么算

Question

#include<stdio.h>
void main()
{
	int a[4][4]={{1,2,3,4},{5,6,7,8},{11,12,13,14},{15,16,17,18}};
	int i=0,j=0,s=0;
	while(i++<4)
	{
		if(i==2||i==4)
			continue;
		j=0;
		do
		{
			s+=a[i][j];j++;}
		while(j<4);
	}
	printf("%d\n",s);
}