String to floating-point integer to floating-point number

sprintf more useful

Float 2 Char

You can use sprintf (): For example, float,double to char#include<stdio.h> #include <stdlib.h> void Main () {float f= 1234.5; Double d= 789.8765;char sf[20],sd[20];sprintf (SF, "%f", f);  float to charsprintf (SD, "%LF", D); Double to char printf ("%s%s\n", SF,SD);  To come out to see}

Char 2 float

You can use the library function atof.

1 Function name Atof

2 statement

Double atof (const char *nptr);

3 Header Files

#include <stdlib.h>

4 Features

Converts the string in the parameter nptr to floating-point data and returns.

5 It is important to note that a valid string, that is, a string stored in real or scientific notation, can be converted or the conversion will go wrong. For example, a string such as "SJDHK" cannot be converted to a floating-point number. In the case of a "1.23sdf" form, it will only be processed to the last number, and the result is 1.23.

5 Sample Code

String to floating-point integer to floating-point number