People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for Red, the middle 2 digits for Green, and the last 2 digits for Blue. The only difference is that they use radix 13 (0-9 and A-C) instead of 16. Now given a color in three decimal numbers (each between 0 and 168), you are supposed to output their Mars RGB values.
Input
Each input file contains one test case which occupies a line containing the three decimal color values.
Output
For each test case you should output the Mars RGB value in the following format: first output "#", then followed by a 6-digit number where all the English characters must be upper-cased. If a single color is only 1-digit long, you must print a "0" to the left.
Sample Input
15 43 71
Sample Output
#123456
问题分析：
实际问题就是把10进制数转换为13进制数。
提交代码：
#include <stdio.h> int decimal_to_other(int decimal, int base, char *other, int size)
{
char str[];
int i, len, tmp; len = ; //while(decimal != 0)
do {
tmp = decimal % base;
if(tmp >= )
{
str[len] = tmp - + 'A';
}
else
{
str[len] = tmp + '';
}
len++;
decimal /= base;
} while(decimal != ); for(i = ; i < len && i < size-; i++)
{
other[i] = str[len--i];
} other[i] = '\0'; return len;
} int main(void)
{
int R, G, B;
int rl, gl, bl;
char r[];
char g[];
char b[]; scanf("%d %d %d", &R, &G, &B); rl = decimal_to_other(R, , r, sizeof(r)/sizeof(r[]));
gl = decimal_to_other(G, , g, sizeof(g)/sizeof(g[]));
bl = decimal_to_other(B, , b, sizeof(b)/sizeof(b[])); printf("#"); if(rl == )
printf("");
printf("%s", r); if(gl == )
printf("");
printf("%s", g); if(bl == )
printf("");
printf("%s", b);
//printf("#%s%s%s", r, g, b); return ;
}