C 語言實例 – 二進制與十進制相互轉(zhuǎn)換

C 語言實例 - 二進制與十進制相互轉(zhuǎn)換

二進制轉(zhuǎn)與十進制相互轉(zhuǎn)換。

實例 - 二進制轉(zhuǎn)換為十進制

#include <stdio.h> #include <math.h> int convertBinaryToDecimal(long long n); int main() { long long n; printf("輸入一個二進制數(shù): "); scanf("%lld", &n); printf("二進制數(shù) %lld 轉(zhuǎn)換為十進制為 %d", n, convertBinaryToDecimal(n)); return 0; } int convertBinaryToDecimal(long long n) { int decimalNumber = 0, i = 0, remainder; while (n!=0) { remainder = n%10; n /= 10; decimalNumber += remainder*pow(2,i); ++i; } return decimalNumber; }

輸出結(jié)果為：

輸入一個二進制數(shù): 110110111
二進制數(shù) 110110111 轉(zhuǎn)換為十進制為 439

實例 - 十進制轉(zhuǎn)換為二進制

#include <stdio.h> #include <math.h> long long convertDecimalToBinary(int n); int main() { int n; printf("輸入一個十進制數(shù): "); scanf("%d", &n); printf("十進制數(shù) %d 轉(zhuǎn)換為二進制位 %lld", n, convertDecimalToBinary(n)); return 0; } long long convertDecimalToBinary(int n) { long long binaryNumber = 0; int remainder, i = 1, step = 1; while (n!=0) { remainder = n%2; printf("Step %d: %d/2, 余數(shù) = %d, 商 = %d\n", step++, n, remainder, n/2); n /= 2; binaryNumber += remainder*i; i *= 10; } return binaryNumber; }

輸出結(jié)果為：

輸入一個十進制數(shù): 100
Step 1: 100/2, 余數(shù) = 0, 商 = 50
Step 2: 50/2, 余數(shù) = 0, 商 = 25
Step 3: 25/2, 余數(shù) = 1, 商 = 12
Step 4: 12/2, 余數(shù) = 0, 商 = 6
Step 5: 6/2, 余數(shù) = 0, 商 = 3
Step 6: 3/2, 余數(shù) = 1, 商 = 1
Step 7: 1/2, 余數(shù) = 1, 商 = 0
十進制數(shù) 100 轉(zhuǎn)換為二進制位 1100100

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