代码实现:
#include<iostream>using namespace std;long fun(char *s){int i,t;long sum=0;for(i=0;s[i];i++){if(s[i]<='9') t=s[i]-'0';else t=s[i]-'a'+10;sum=sum*16+t;}return sum;}main(){ long m;char s[50];cout<<"请输入十六进制数: ";cin>>s;m=fun(s);cout<<"十进制数为:"<<m<<endl;}
运行结果: