convert char to float???

Hello everybody,


I need an urgent answer to a question: how do you convert a character in C++ into float? I need to do a float computation. I tried converting the char into integer , but even that doesnt work (i used strtoi, atoi, and char-'0'). Then my friend says even if you convert to int, the float computation of float =int/int is wrong. If you know how to , please give a short example.


Thanks thannks thanks!!!!

Are you trying to convert a number in a character string to a float, or just a character to a float?

If it's just a character (as your question suggests), you can cast it as follows:

char MyChar = 'A';
float MyFloat = (float)MyChar;

printf("MyFloat = %.2f\n", MyFloat);

Which should give something like:

MyFloat = 65.00

Hope this helps,

- Nigel

Hi Nigel,


Thanks for your reply, but it is actually a string. I need to convert some characters into float's and push them into a stack.

So i did something like:

d = string[a];
int temp = d- '0';
stackObject_2.push(temp);

Or, what behaves in the same way,

int temp = string [a] - '0'
stackObject_2.push(temp);

because I wanted to see that it works like that first. However, because of the string I get the stupid problem that the stack gets an extra two zeros as the first input (no idea how that happens). I have the feeling that d gets to be a string of one character and the null at the end, although i only mean it to be a character


Thanks again

#include <stdlib.h>
#include <stdio.h>

int _tmain()
{
char buf[64];
float fval;

strcpy(buf, "123.234");
printf("buf = %s\n", buf);

fval = atof(buf);
printf("%0.3f\n", fval);


return 0;
}

• How to convert a numeric type to a string?
• How to convert a string into a numeric type?

thank you, folks,

you are awesome !! my project is now working!!


hustle Q.