49 lines
1009 B
C++
49 lines
1009 B
C++
include <bits/stdc++.h>
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using namespace std;
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//将一个16进制的灰阶转为一个整数，方便用来当数组的下标索引值
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int toDec(char a, char b) {
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int res = 0;
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if (a >= '0' && a <= '9')
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res += (a - '0') * 16;
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else if (a >= 'A' && a <= 'F')
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res += (a - 'A' + 10) * 16;
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if (b >= '0' && b <= '9')
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res += b - '0';
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else if (b >= 'A' && b <= 'F')
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res += b - 'A' + 10;
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return res;
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}
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//将一个十进制的灰阶值[0,255]转化成十六进制[0,FF]
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string toHex(int x) {
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char c1, c2;
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int a = x % 16; // 0 ~ 15
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int b = x / 16; //
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if (a >= 10)
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c1 = 'A' + a - 10;
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else
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c1 = '0' + a;
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if (b >= 10)
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c2 = 'A' + b - 10;
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else
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c2 = '0' + b;
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string res;
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res.push_back(c2);
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res.push_back(c1);
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return res;
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}
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int main() {
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cout << toDec('A', 'B') << endl;// AB-->? 10*16+ 11 =171
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cout << toDec('1', '3') << endl;// 19
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cout << toDec('1', 'A') << endl;// 26
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cout << toHex(171) << endl; //AB
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cout << toHex(19) << endl; //13
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cout << toHex(26) << endl; //1A
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return 0;
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}
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