Thank you for your reply nixcraft.
This is the complete code that reproduces the warning:
example.cpp :
Code:
#include <stdio.h>
#include <string.h>
typedef long long int_64;
int main(void)
{
char buffer[51];
int_64 huge_number = 2000000000 * 4;
memset(buffer, 0, 50);
sprintf(buffer, "%u", huge_number);
printf("Result: %s\n", buffer);
return 0;
}
Compile it with the command:
Code:
gcc -lstdc++ -Wall example.cpp -o example
The compiler output:
Code:
example.cpp: In function `int main()':
example.cpp:11: warning: unsigned int format, different type arg (arg 3)
When I run it:
Code:
./example
Result: 3705032704
Quote:
|
Originally Posted by rick
The sprintf does work for numbers larger then 32 bit though, the output is correct.
|
That seems to be untrue.
In this example 2000000000 * 4 should be 8000000000 instead of 3705032704.
So it seems the compiler warning is right.
That leaves the question: How can I convert a very large number (over 32 bit
to a string?