返回true是返回false吗？魔法-Java 学习之路

我的C程序中有问题从VoIP数据包中提取音频 .

它在amd64和x86上的Linux和OpenBSD上运行良好，但是当我在ARM上运行OpenBSD上的程序时，它真的很神奇 .

我在LoadConfigFile中调用return true，在ProcessConfiguration中调用结果为false .

谁能帮帮我吗？也许我只是真正的盲人 . 我在代码中做了很多测试打印 .

这是调用函数ProcessConfiguration的程序的主要功能 .

int main ( int argc, char **argv ) {

    if ( ! config.ProcessConfiguration( argc, argv ) ) {
        std::cout << "process configuration failed" << std::endl;
        std::cout << "exiting whole program with EXIT_FAILURE" << std::endl;
        return EXIT_FAILURE;
    }

    std::cout << "process configuration is true" << std::endl;

    // User want to only print configuration
    if ( config.m_printconfig == true ) {
        config.PrintConfig();
        return EXIT_SUCCESS;
    }
    .
    . // Long uninteresting code
    .
    return EXIT_SUCCESS;
}

这是函数ProcessConfoguration，它调用LoadConfigFile .

bool TConfig::ProcessConfiguration ( int & argc, char ** & argv ) {

    // Scan options from command line
    int c;
    while (( c = getopt ( argc, argv, "c:dhn" )) != EOF ) {
        switch (c) {
        case 'c':
            m_configfile = optarg;
            break;
        case 'd':
            m_daemon = false;
            break;
        case 'h':
            m_printusage = true;
            return true;
        case 'n':
            m_printconfig = true;
            break;
        default:
            return false;
        }
    }
    argc -= optind;
    argv += optind;

    if ( LoadConfigFile() == false ) {
        std::cout << "LoadConfigFile was false" << std::endl;
        return false;
    }
    std::cout << "LoadConfigFile was true" << std::endl;
    return true;
}

此函数加载配置文件，解析所有指令 .

bool TConfig::LoadConfigFile ( void ) {

    std::string line;
    std::string directive;
    std::ifstream data;

    if ( m_configfile.empty() ) {
        m_configfile = DEFAULT_CONFIGFILE;
    }

    std::cout << "opening file " << m_configfile << std::endl;

    data.open( m_configfile.c_str() );

    if ( ! data.is_open() ) {
        std::cerr << "Couldn't open config " << m_configfile << std::endl;
        return false;
    }
    std::cout << "configfile is open" << std::endl;
    std::cout << "before getline" << std::endl;
    while ( getline( data, line ) ) {
        std::cout << "after getline" << std::endl;
        trim_whitespaces( line );
        .
        . // Long uninteresting code
        .
    }
    std::cout << "before data.close" << std::endl;
    data.close();
    std::cout << "before return true in LoadConfigFile" << std::endl;
    return true;
}

这是终端上的输出 .

$ ./call-extract -c call-extract.conf -d -n 
opening file call-extract.conf
configfile is open
before getline
before data.close
before return true in LoadConfigFile
LoadConfigFile was false
process configuration failed
exiting whole program with EXIT_FAILURE
$ echo $?
1
$

我在LoadConfigFile中调用return true，在ProcessConfiguration中调用结果为false .

1 回答

返回true是真的 .

输出给我：

before return true in LoadConfigFile
LoadConfigFile was true

代码没有不感兴趣的部分：

struct TConfig
{
    bool ProcessConfiguration()
    {
        bool rv = true;
        if( !LoadConfigFile() ) { rv = false; }
        printf("LoadConfigFile was %s\n", rv?"true":"false" );
        return rv;
    }

    bool LoadConfigFile ( void )
    {
        printf("before return true in LoadConfigFile\n");
        return true;
    }
};
void fv()
{
    TConfig config; config.ProcessConfiguration();
}

回复于 2024-04-29T01:41:25+08:00

返回true是返回false吗？魔法

1 回答

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