Applies a low-pass filter to sequences of valid temperature readings for consecutive times.
 * If a non-valid temperature reading is found, the filter should restart at the next valid
 * temperature reading. The following describes the low-pass filter used:
 *
 *    filtered_output(0) = unfiltered_input(0)
 *    filtered_output(n) = 0.9375 * filtered_output(n-1) + 0.0625 * unfiltered_input(n)
 *
 */
void LowPassFilter(ACTempData acTemps[])
{
    int a; // The first valid data.
    int i;
    int n;
    a = 0;
    i = 0;
    n = 1;
    while(acTemps[a].valid != 1)
        ++a;
    for(i = a; i < MinPerDay; ++i){
        n = 1;
        while(i != a && acTemps[i-n].valid == 0)
            ++n;
        if(i != a && acTemps[i].valid == 1){
            acTemps[i].temperature = 0.9375 * acTemps[i-n].temperature + 0.0625 * acTemps[i].temperature;
        }
    }
}
我实在没有办法了，只能求助论坛了。如何用另一种形势，比如改while 等等来重写这个function

[ 本帖最后由 yuchao130 于 2014-9-12 03:03 编辑 ]

我弄错了，我这个function弄明白了一部分。

我只列出了整个程序的其中一个function，所以根本说不通。。。。。。。