c++函数参数表的问题（新手） - 编程论坛

#2

weany2007-09-19 23:47

看了几遍鸟，新手啊！
还是看不懂！>_<

不知道程序什么意思啊？

#3

HJin2007-09-19 23:53

回复：（weany）看了几遍鸟，新手啊！还是看不懂！&...

understand variable legnth paramters first.

Her is a piece of code I wrote 10 years ago.

程序代码：

#include <iostream>
#include <cstdarg> // for va_list, va_start, va_end, va_arg

using namespace std;

bool debug = false;

void DebugOutput(const char* formartString, ...)
{
va_list ap;

    if(debug)
    {
        va_start(ap, formartString);
        vfprintf(stderr, formartString, ap);
        va_end(ap);
    }
}

void SquareInts(int counter, ...)
{
    int temp;
    va_list ap;
    va_start(ap, counter);
    for(int i=0; i<counter; ++i)
    {
        temp = va_arg(ap, int);
        cout<<temp*temp<<\" \";
    }
    va_end(ap);

cout<<endl;
}

int main()
{
debug = true;

    DebugOutput(\"This is the debug output\n\");
    DebugOutput(\"int %d\n\", 13);
    DebugOutput(\"My name is %s and I am %d years old\n\", \"John Doe\", 20);
    DebugOutput(\"lots of integers here %d %d %d %d %d\n\", 5, 7, 6, -3, 90);

cout<<\"---------------------------------------------------------\"<<endl;
SquareInts(3, 40, 23, -20);

return 0;
}

#4

weany2007-09-20 08:11

哦
感谢版主！