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Asked: 2026-05-25T23:15:42+00:00

I am using CodeBlocks 10.05 with Cygwin 1.7 to compile some C++ codes. The

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I am using CodeBlocks 10.05 with Cygwin 1.7 to compile some C++ codes. The operating system is WinXP SP3. The compiler used is g++ 4.5.3.

When I build the following program: 

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

using namespace std;

int main()
{
    unsigned long long a = 12345678901234;
    printf("%u\n",a);
    return 0;
}

it outputs the following in the build log:

C:\Documents and Settings\Zhi Ping\Desktop\UVa\143\main.cpp||In function ‘int main()’:|
C:\Documents and Settings\Zhi Ping\Desktop\UVa\143\main.cpp|9|warning: format ‘%u’ expects type ‘unsigned int’, but argument 2 has type ‘long long unsigned int’|
C:\Documents and Settings\Zhi Ping\Desktop\UVa\143\main.cpp|9|warning: format ‘%u’ expects type ‘unsigned int’, but argument 2 has type ‘long long unsigned int’|
||=== Build finished: 0 errors, 2 warnings ===|

I do not know why CodeBlocks prints the ‘ etc. symbols. Is there a way for CodeBlocks to properly display the characters?

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1 Answer

  1. Editorial Team

    Cygwin defaults to the UTF-8 encoding, whereas it looks like CodeBlocks assumes that output is in CP1252. Furthermore, since Cygwin tells it that UTF-8 is available, gcc uses separate left and right versions of quote characters instead of the usual ASCII ones. The result is what you’re seeing. There are two ways to tackle this: either tell CodeBlocks to use UTF-8, or tell gcc to stick to ASCII by setting LANG=C. I don’t know how to do either of these in CodeBlocks though.

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