cpp #include <iostream> #include <string> int main() { float num = 123.456f; std::string str = std::to_string(num); std::cout << "Converted string: " << str << std::endl; return 0;
1. 使用to_string() to_string() 方法采用单个整型变量或其他数据类型并将其转换为字符串。 句法: - string to_string (float value); 例子: C++ #include<bits/stdc++.h>usingnamespacestd;intmain(){floatx=5.5;stringresultant; resultant=to_string(x);cout<<"Converted value from float to String us...
Suppose you have a constant floating-point number, and you want to convert it into a string using preprocessor macros. Here’s how you can do it: #include<iostream>#include<string>using std::cout;using std::endl;using std::string;#defineSTRINGIFY_FLOAT(x) #xintmain(){string num_str=ST...
/* _GCVT.C: This program converts -3.1415e5 * to its string representation. */#include <stdlib.h>#include <stdio.h>void main( void ){ char buffer[50]; double source = -3.1415e5; _gcvt( source, 7, buffer ); printf( "source: %f buffer: '%s'\n", source, buffer ); _gcvt( so...
the 3.140000 convert to string style: "3.14". 读者可以测一下这两个函数所有的时间,才选择相应的方法,其他的方法(如使用boost库中的函数)就不再记述了。 由字符串转浮点数字大家喜欢用atof()函数。在使用Microsoft C/C++开发应用程序时,sscanf()函数很好地替代 atof() 函数,将数字字符串转换为浮点数。如果字...
Convert string to double (function ) wcstol Convert wide string to long integer (function ) wcstoul Convert wide string to unsigned long integer (function ) 1. 2. 3. 4. 5. 6. 另外,网上有人写 float a; CString str; a = (float)atof((char *)(LPTSTR)(LPCTSTR)str); ...
1.int/floatto string/array:C语言提供了几个标准库函数,可以将任意类型(整型、长整型、浮点型等)的数字转换为字符串,下面列举了各函数的方法及其说明。 ● itoa():将整型值转换为字符串。 ● ltoa():将长整型值转换为字符串。 字符串 整型 #include ...
area.cpp: In function ‘float get_float(std::string)’: area.cpp:37: error: ‘atof’ was not declared in this scope Last edited onOct 18, 2013 at 9:17pm Oct 18, 2013 at 9:18pm Chervil(7320) Do you have #include <cstdlib> ...
The C++ std::string::stof() function is used to convert a string to a floating point number. This function analyse the string, extracting a floating point value starting from the beginning of the string. If the conversion is successful, it returns the float value, otherwise it throws an ...
1.int/floatto string/array:C语言提供了几个标准库函数,可以将任意类型(整型、长整型、浮点型等)的数字转换为字符串,下面列举了各函数的方法及其说明。 ● itoa():将整型值转换为字符串。 ● ltoa():将长整型值转换为字符串。 字符串 整型 #include ...