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局部变量与全局变量有何差别#include <stdio.h>
int x[200002],y[200002];
main()
{
int i,j,n,m,X,Y,scst,scol;
scanf("%d",&n);
while(n)
{
scst=0;
scol=0;
for(i=1;i<=n;i++)
scanf("%d%d",&x[i],&y[i]);
X=x[(1+n)/2];
Y=y[(1+n)/2];
for(i=1;i<=n;i++)
{
if(x[i]>X&&y[i]>Y||x[i]<X&&y[i]<Y)
scst++;
else if(x[i]>X&&y[i]<Y||x[i]<X&&y[i]>Y)
scol++;
}
printf("%d %d\n",scst,scol);
scanf("%d",&n);
}
}
这是我这一题的代码,将x[]和y[]申请为全局变量时内存是184K,时间是0Ms。
可是当把x[]和y[]申请为局部变量时内存就变成了1720K,时间也变成了16Ms。这是为什么?哪位帮忙解释一下!
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