C++里面有没有直接把16进制转10进制的函数

Question

如题所述

Answer 1

#include<iostream.h>
#include<stdlib.h>
#define MAX 30
//main()的定义
int main(void)
{
char str[MAX],*p;

//从键盘上输入int数
cout<<"Please input a int:"<<endl;
int n;
cin>>n;

//将整型数n按十进制转换为字符串并输出
p=itoa(n,str,10);
cout<<"str="<<str<<endl;
cout<<"p="<<p<<endl;

//将整型数n按十六进制转换为字符串并输出
p=itoa(n,str,16);
cout<<"str="<<str<<endl;
cout<<"p="<<p<<endl;

//从键盘上输入double类型的数据
cout<<"Please input a double:"<<endl;
double x;
cout<<"x=";
cin>>x;

//将浮点数x转换为字符串后输出
p=gcvt(x,10,str);
cout<<"str="<<str<<endl;
cout<<"p="<<p<<endl;

return 0;
}