十进制转十六进制

#include <stdio.h>
#include <stdlib.h>
int main(){
	int num,i,c,a[32];
	char b[6]={'a','b','c','d','e','f'};
	while(printf("请输入一个十进制的数:"),(scanf("%d",&num))!=EOF){
		i=0;
		while(num>0){
			a[i]=num%16;
			i++;
			num=num/16;
		}
		a[i]=num%16;

		num=num/16;
		for(i--;i>=0;i--){
			if(a[i]>9){
				printf("%c",b[a[i]-10]);
			}else{
				printf("%d",a[i]);}

		}

		printf("\n");
	}

	system("pause");
}