进制转换,将一个数从M进制转换成N进制
Code/**
* 功能：将一个数从M进制转换成N进制
* MValue：M进制数的字符串表示方法
* Shang：保存中间运算结果
* M：M进制
* N：N进制
*/
public class M2N {
// 在这里对输入赋值
public static String MValue = "1231412423534674574757";
public static String Shang = null;
public static int M = 10;
public static int N = 8;
public static void main(String[] args) {
String nValue = "";
Shang = MValue;
while(Shang.length() > 0) {
nValue = qiuyu(Shang) + nValue;
}
System.out.println(nValue);
}
/**
* 功能：对给定的M进制字符串对n求余。
*
* @param MTempValue
* @param m
* @param n
* @return
*/
public static String qiuyu(String MTempValue) {
Shang = "";
int temp = 0;
while (MTempValue.length() > 0) {
int t = getIntFromStr(MTempValue.substring(0, 1));
MTempValue = MTempValue.substring(1);
temp = temp * M + t;
Shang += getStrFromInt(temp / N);
temp = temp % N;
}
while(Shang.length() > 0 && Shang.charAt(0) == '0'){
Shang = Shang.substring(1);
}
return getStrFromInt(temp);
}
public static int getIntFromStr(String str){
return str.charAt(0) <= '9' && str.charAt(0) >= '0'?
str.charAt(0) - '0' : str.charAt(0) - 'a' + 10;
}
public static String getStrFromInt(int value){
String result = null;
if(value>=0 && value<=9)
result = (String)('0'+ value);
else if(vlaue > 9 && value <36)
{
result = (String)('0'+ value - 10);
}
else
{
result = “-1”;//出错误了
}
return result;
}
}
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