一共找到92个。和问题的标准答案吻合。

最粗糙的第一版代码附上：

[code lang="c"]
#include
#include

#define LINE 8

void printChess(int *queens);
int checkLine(int *queens, int checkLine);

int
main(void)
{
int queens[] = {0, -1, -1, -1, -1, -1, -1, -1};
int thisLine = 1;
while(1)
{
queens[thisLine] = checkLine(queens, thisLine);
if(queens[thisLine] == -1)
{
thisLine -= 1;
if(thisLine < 0)
{
break;
}
}
else if(thisLine == (LINE - 1))
{
printChess(queens);
queens[thisLine] = -1;
thisLine -= 1;
}
else
{
thisLine += 1;
}
}
return EXIT_SUCCESS;
}

int
checkLine(int *queens, int checkLine)
{
int i;
int startNum = *(queens + checkLine);
for(i = startNum + 1 ; i < LINE ; i += 1)
{
int getValue = 0;
int targetLine = checkLine;
while(--targetLine >= 0)
{
int step = checkLine - targetLine;
int target = *(queens + targetLine);
if((target == i) || (target == i - step) || (target == i + step))
{
break;
}
else
{
getValue += 1;
}
}
if(getValue == checkLine)
{
return i;
}
}
return -1;
}

void
printChess(int *queens)
{
static int count = 0;
printf("nOutput %d:n", ++count);

int i, j;
for(i = 0 ; i < LINE ; i += 1)
{
for(j = 0 ; j < LINE ; j += 1)
{
printf("%c ", (j == queens[i] ? 'Q' : '*'));
}
printf("%s", "n");
}
}
[/code]

following codes are wrote in C by using code::blocks + WinGW.
[code]
int a = 0;
a = (a++) + (a++);
printf("%d", a);
[/code]

in my opinion (most of which from ActionScript coding), first “a++” make a’s value increase to “1″ and return 0, next “a++” make a’s value increase to “2″ and return 1, so the resulte is 0 + 1 and assign back to a, so print 1. but it shows 2.

i modified code to:

[code]
int a = 0;
int b;
b = (a++) + (a++);
printf("%d", b);
[/code]

it is strange, value “0″ is shown on screen. much different from Java and AS as i known before.

i am not sure, but is have these results:

1, the strange print value is caused by compiler.
2, in WinGW, if you use ++(–) to the same value, it returns the original value.
3, in WinGW, one variate cannot be used in both L-exp and R-exp.

i think i find the answer, see this, and this.

• ZZ：保存并退出
• :w 文件名：将当前文件保存为“文件名”，不能覆盖同名文件
• :w! 文件名：将当前文件保存为“文件名”，覆盖同名
• :set nu：显示行号
• G：移动到末行行首
• nG：移动到第n行行首
• <ctrl>+g：报告光标位置
• dd：删除当前行
• u：取消前一次操作
• ?string<enter>：查找字符串
• n：重复向前查找
• N：重复向后查找
• :1,$s/oldstr/newstr/g：在整个文件中，用newstr替换oldstr
• yw：将当前行光标以后的文字复制
• nyw：将当前行光标后的n个文字复制
• yy：复制当前行
• p：将复制的内容插入到当前光标后

关于C：

• 建议用全小写加下划线的方式命名，不推荐骆驼命名法。
• ++运算只针对变量，不能针对表达式。
• C中的变量有效字符只有字母数字和下划线。
• 以“”括起来的字符是字符串常量，系统会自动在结尾添加标示字符串的结束，‘’的是字符。
• C中的强制类型转换格式是(int)a，而不是int(a)。
• C函数中，实参对形参的数据传递是单向的“值传递”。