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@ -0,0 +1,82 @@
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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// 函数:将单个字符转换为对应的数值
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int charToVal(char c) {
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if (c >= '0' && c <= '9') return c - '0';
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else if (c >= 'A' && c <= 'F') return c - 'A' + 10;
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else if (c >= 'a' && c <= 'f') return c - 'a' + 10;
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else return -1; // 非法字符
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}
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// 函数:将数值转换为对应的字符
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char valToChar(int val) {
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if (val >= 0 && val <= 9) return '0' + val;
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else return 'A' + val - 10;
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}
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// 函数:将字符串形式的数从fromBase进制转换为十进制
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int convertToDecimal(char *num, int fromBase) {
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int len = strlen(num);
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int power = 1; // 表示当前位的权重
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int numDecimal = 0; // 存放结果的十进制数
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for (int i = len - 1; i >= 0; i--) {
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int val = charToVal(num[i]);
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if (val < 0 || val >= fromBase) {
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printf("输入错误: 你所输入的数 %c 不是 %d进制\n", num[i], fromBase);
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return -1; // 如果有非法字符,则返回 -1
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}
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numDecimal += val * power;
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power *= fromBase; // 计算权重
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}
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return numDecimal;
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}
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// 函数:将十进制数转换为toBase进制的字符串形式
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void convertFromDecimal(int numDecimal, int toBase, char *result) {
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int index = 0; // 指示result数组中的当前位置
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if (numDecimal == 0) {
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result[index++] = '0'; // 特例处理零
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}
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while (numDecimal > 0) {
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int remainder = numDecimal % toBase;
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result[index++] = valToChar(remainder);
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numDecimal /= toBase;
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}
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result[index] = '\0'; // 添加字符串结束符
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// 反转字符串
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for (int i = 0; i < index / 2; i++) {
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char temp = result[i];
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result[i] = result[index - i - 1];
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result[index - i - 1] = temp;
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}
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}
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int main() {
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char num[20];
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int fromBase, toBase;
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char result[20];
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printf("请输入数字: ");
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scanf("%s", num);
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printf("请输入当前数字的进制(2 to 16): ");
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scanf("%d", &fromBase);
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printf("请输入您预期得到数字的进制(2 to 16): ");
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scanf("%d", &toBase);
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// 转换为十进制
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int numDecimal = convertToDecimal(num, fromBase);
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if (numDecimal < 0) {
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return 1; // 如果转换出错则直接返回
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}
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// 转换为目标进制
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convertFromDecimal(numDecimal, toBase, result);
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printf("转化后的数字: %s\n", result);
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return 0;
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}
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