题目：求0—7所能组成的奇数个数。

题目：求0—7所能组成的奇数个数。

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1.程序分析：
2.程序源代码：
main()
{
long sum=4,s=4;
int j;
for(j=2;j<=8;j++)/*j is place of number*/
{ printf("\n%ld",sum);
if(j<=2)
s*=7;
else
s*=8;
sum+=s;}
printf("\nsum=%ld",sum);
}