第6章循环6、输入数n,显示1~n所有偶数平方值
int i, n;
printf("Enter limit on maximum square: ");
scanf("%d", &n);
for(i = 2; i * i <= n; i += 2)
printf("%d\n", i * i);
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int n, i = 2;
scanf("%d", &n);
while(i * i <= n)
{
printf("%d\n", i * i);
i += 2;
}

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