Summary of Array Search Methods

I. Introduction

The following explanation is based on a function that converts zone codes to Unicode in a Chinese character set.

DWORD Unicode2GBQuWei(WORD wUnicode){    DWORD dwQuNum;    DWORD dwWeiNum;    DWORD i,dwResult = 0;        for(i = 0; i < MAXUNICODENUM; i++)  // Simplest and most straightforward search implementation    {        if(wUnicode == Unicode[i])        {            dwResult = 0;                        if(GBQuWei[i] != DNULL)            {                dwQuNum = (DWORD)GBQuWei[i];    // Following four lines apply conversion rules                                dwWeiNum = (DWORD)GBQuWei[i];                                dwQuNum = (dwQuNum & 0xff00) >> 8;                                dwWeiNum = dwWeiNum & 0x00ff;                                if(dwQuNum < 0x58)                {                                    dwDispAddQuWeiChinese(dwQuNum,dwWeiNum);                }                else                {                    // The required Chinese character is not present in the dot matrix font library                    dwDispAddQuWeiChinese(4, 1);                }            }            else            {                // The required Chinese character is not present in the dot matrix font library                dwDispAddQuWeiChinese(4, 2);            }                        return dwResult;        }        else        {            dwResult = 1;        }    }        if(dwResult == 1)    {        dwDispAddQuWeiChinese(4, 3);    }        return dwResult;}

DWORD GBQuWei2Unicode(DWORD dwQuNum, DWORD dwWeiNum){    DWORD i,dwResult = 0;    WORD wQuWeiNum;        wQuWeiNum = (WORD)(dwQuNum << 8) + (WORD)dwWeiNum;           for(i = 0; i < MAXUNICODENUM; i++)    {        if(wQuWeiNum == GBQuWei[i])        {            dwResult = (DWORD)Unicode[i];                        return dwResult;        }        else        {            dwResult = 0;        }    }        return dwResult;}

II. Debugging

1. Segmentation fault

What could be causing this? Is it due to overflow or insufficient memory? But why do other programs run successfully?

III. MIT Practices

1. Steps for learning new content:

1. Resolve terminology first.

2. Start with applications. As Linus said, learn to use it first. Once you've used it, curiosity arises, and following that interest becomes a motivating and enjoyable learning path (interest is the best teacher).

2. Observe, identify patterns, and cultivate patience.

For example, Newton's observations of light.

3. In complex problems, unfamiliarity with C syntax can become a significant issue. To reduce error probability and lower problem complexity, mastering C syntax, common programming patterns, and typical issues is a wise choice.