1027 Colors in Mars (20)(20 分)
題目描述:
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.
輸入格式:
Each input file contains one test case which occupies a line containing the three decimal color values.輸出格式:
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.
題目大意:
這道題目很簡單,就是把10進制數轉爲13進制數,然後輸出。
解題方法:
直接用一個char數組存放對應每個10進制數對應的13進制結果,然後用取餘法,得到13進制數,直接輸出即可。
程序:
#include <stdio.h>
void trans(int N)
{
int out[2] = {0, 0}, idx = 1;
char ch[13]; ch[10] = 'A', ch[11] = 'B', ch[12] = 'C';
for (int i = 0; i < 10; i++)
ch[i] = i + '0'; /* 初始化 */
while (N > 0)
{ /* 取餘法求轉換後的進制 */
out[idx--] = N % 13;
N /= 13;
}
for (int i = 0; i < 2; i++) /* 輸出結果 */
printf("%c", ch[out[i]]);
}
int main(int argc, char const *argv[])
{
int R, G, B;
scanf("%d %d %d", &R, &G, &B);
printf("#");
trans(R);
trans(G);
trans(B);
return 0;
}
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