十进制数转二进制数的C实现代码

#include <stdio.h>#include <string.h>char* DecToBin(int value);int main(int argc,char* argv[]){int value = 9999;char* Strp = DecToBin(value);printf("result:%s/n",Strp);return 0;}//十进制数转二进制char* DecToBin(int value){char* strp = new char[100];memset(strp,0,sizeof(char)*100);int j=0;do {int n = value%2;char cTmp = n + '0';strp[j++] = cTmp;} while ( value = value/2 );printf("before:%s/n",strp);//中间结果，需要逆序//逆序处理，得出最终的二进制数int length = strlen(strp);int mid = length/2;//因为从0计算，则无论长度为奇偶，都只取一半for(int i=0;i<mid;++i){char tmp = strp[i];strp[i] = strp[length-1-i];strp[length-1-i] = tmp;}printf("after :%s/n",strp);return strp;}