I trying to merge all members of a float array in a char array.
This is float array :
float myFloatArray[2] = {10,20};
And this is char array :
char myCharArray[32];
I want to set char array like "1020"
in C# i can do it like this;
string myStr = myFloatArray[0] + myFloatArray[1];
but how can i do this in C?
If you only have two numbers to be converted, then you can simply write
snprintf(
myCharArray, sizeof myCharArray,
"%.0f%.0f",
myFloatArray[0],
myFloatArray[1]
);
Here is a working example program:
#include <stdio.h>
int main(void)
{
float myFloatArray[2] = {10,20};
char myCharArray[32];
snprintf(
myCharArray, sizeof myCharArray,
"%.0f%.0f",
myFloatArray[0],
myFloatArray[1]
);
printf( "%s\n", myCharArray );
}
This program has the following output:
1020
%.0f.
myCharArray[0] has the value '1', because that is the first character of the string "1020". What makes you think that it has the value "null"?myCharArray[0] has the value 49, which is the ASCII character code for the digit 1. Therefore, as far as I can tell, my solution is correct.A simple way is to use sprintf to convert the first and second elements of the float array to strings, and concatenate them into the char array. The "%.0f" format specifier tells sprintf to format the float value as an integer.
sprintf(myCharArray, "%.0f%.0f", myFloatArray[0], myFloatArray[1]);
Also notice the answer provided in this post where snprintf is suggested for safety reasons.
snprintf(myCharArray, sizeof(myCharArray), "%.0f", myFloatArray[0]);
snprintf(myCharArray+strlen(myCharArray), sizeof(myCharArray)-strlen(myCharArray), "%.0f", myFloatArray[1]);
string myStr = myFloatArray[0] + myFloatArray[1];will not compile in C#. Do you meanstring myStr = myFloatArray[0].ToString() + myFloatArray[1].ToString();?{1,20}and{12,0}to print out? Or{1,2,3}vs.{123};vs.{12. 30, 0};?