浮点数转换成字符串的实现-C++实现

浮点数分成整数和小数两个部分，分别进行单独处理，最后和小数点符号合成一个字符串。

废话不多说，直接上代码：

#include <iostream>
#include <string>

using namespace std;

string GetFront(int Front)
{
string strFront;
strFront.clear();
int shang, yu;
char c = '0';
while(Front/10>= 1)
{
shang = Front/10;
yu = Front%10;
c += yu;
strFront.push_back(c);
Front = shang;
c = '0';
}
c = '0';
c += shang;

strFront.push_back(c);

string a;

while(!strFront.empty())
{
char tmp = strFront.back();
strFront.pop_back();
a.push_back(tmp);
}

return a;
}

string GetBehind(float Behind)
{
string strBehind;
float xs, xs10;
int zs;
xs = Behind;
char c = '0';
while(xs> 0.000001)
{
xs10 = xs*10;
zs = xs10;
xs = xs10 - zs;
c += zs;
strBehind.push_back(c);
c = '0';
}
return strBehind;
}

void main()
{
float t = 123.45601;
int zs = t;
float xs = t - zs;
string a = GetFront(zs);
string b = GetBehind(xs);
char c = '.';
string result = a + c + b;
cout<<result.c_str()<<endl;
system("pause");
}

结果如下：