函数 char *digitToAlpha (int val, char *buf, unsigned radix) 的功能是将数值转换为字符串。
参数:第一个是要转化的整数，第二个是转化后的字符串，第三个是要转化整数的基数，就是说如果基数是10，就可以直接转化，如果不是10，是其他值（2-36之间），则先把该整数转化为该基数的数后，再转化为字符串。
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#include <stdio.h> |
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#include <stdlib.h> |
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char *digitToAlpha (int val, char *buf, unsigned radix); |
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int main(int argc, char *argv[]) |
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{ |
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int iNum = 55; |
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char strNum[10] = ""; |
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digitToAlpha(iNum,strNum,10); |
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printf("%s \n",strNum); |
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|
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system("PAUSE"); |
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return 0; |
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} |
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/* |
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功能:将数值转换为字符串 |
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参数:第一个是要转化的整数 |
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第二个是转化后的字符串 |
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第三个是要转化整数的基数，就是说如果基数是10，就可以直接转化，如果不是10，是其他值（2-36之间），则先把该整数转化为该基数的数后，再转化为字符串 |
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*/ |
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char *digitToAlpha (int val, char *buf, unsigned radix) |
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{ |
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char *p; /* pointer to traverse string */ |
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char *firstdig;/* pointer to first digit */ |
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char temp; /* temp char */ |
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unsigned digval; /* value of digit */ |
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p = buf; |
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if(val<0) |
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{ |
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/* negative, so output '-' and negate */ |
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*p++= '-'; |
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val = (unsigned long)(-(long)val); |
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} |
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firstdig = p;/* save pointer to first digit */ |
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do { |
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digval = (unsigned)(val%radix); |
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val /=radix; /* get next digit */ |
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/* convert to ascii and store */ |
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if (digval > 9) |
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*p++ = (char) (digval - 10 + 'a'); /* a letter */ |
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else |
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*p++ = (char) (digval + '0'); /* a digit */ |
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} while(val > 0); |
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/* We now have the digit of the number in the buffer, but in reverse |
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order. Thus we reverse them now. */ |
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*p-- = '\0'; /* terminate string; p points to last digit */ |
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do |
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{ |
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temp = *p; |
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*p =*firstdig; |
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*firstdig= temp; /* swap *p and *firstdig */ |
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--p; |
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++firstdig; /* advance to next two digits */ |
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} while (firstdig < p); /* repeat until halfway */ |
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return buf; |
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} |
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