66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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void convert(int n, int b, char **result, int *size) {
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// 計算需要的位數
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int temp = n;
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*size = 0;
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while (temp > 0) {
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temp /= b;
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(*size)++;
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}
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// 配置記憶體
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*result = (char*)malloc((*size + 1) * sizeof(char));
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if (*result == NULL) {
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printf("記憶體配置失敗！\n");
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return;
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}
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// 進行轉換
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int i = *size - 1;
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while (n > 0) {
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int remainder = n % b;
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if (remainder < 10) {
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(*result)[i] = remainder + '0';
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} else {
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(*result)[i] = (remainder - 10) + 'A';
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}
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n /= b;
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i--;
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}
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(*result)[*size] = '\0'; // 添加字串結尾
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}
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int main() {
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int n, b;
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char *result; // 用來存放轉換結果的指標
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int size; // 結果的長度
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while(1) {
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printf("\n輸入待轉換的十進位正整數 ==> ");
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scanf("%d", &n);
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if(n == -1) break;
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printf("\n輸入轉換之基底 ==> ");
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scanf("%d", &b);
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convert(n, b, &result, &size); // 傳入指標的位址
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printf("(%d)_10 = (", n);
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for(int i = 0; i < size; i++) {
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printf("%c", result[i]);
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}
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printf(")_%d\n", b);
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free(result); // 釋放配置的記憶體
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}
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printf("程式將結束...按任意鍵繼續\n");
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system("pause");
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return 0;
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}
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