C语言中如何将字符串转换成float和double类型

先贴上可编译运行的源代码：

file: a.cpp

#include

#include
int main ()
{
char szOrbits[] ="365.24";
char* pEnd;
float f1;
f1 = strtof (szOrbits, &pEnd);
printf("%f\n",f1);
return 0;
}

执行结果：

[tuxedo@imorcl yali_test]$ g++ a.cpp -o aaa
[tuxedo@imorcl yali_test]$ ./aaa
365.239990

man参考手册：在linux上 man strtod就能显示

NAME
strtod, strtof, strtold - convert ASCII string to floating point number

SYNOPSIS
#include

double strtod(const char *nptr, char **endptr);

#define _XOPEN_SOURCE=600 /* or #define _ISOC99_SOURCE */
#include

float strtof(const char *nptr, char **endptr);
long double strtold(const char *nptr, char **endptr);

DESCRIPTION
The strtod(), strtof(), and strtold() functions convert the initial portion of the string pointed to by nptr to double, float, and
long double representation, respectively.

。。。

推荐阅读：