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      std::getenv

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      C++
       
      Biblioteca de utilitários
      Digite apoio (basic types, RTTI, type traits)
      Gerenciamento de memória dinâmica
      De tratamento de erros
      Utilidades do programa
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      Objetos de função
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      (C++11)
      Os operadores relacionais
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      Relational operators
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      rel_ops::operator!=
      rel_ops::operator>
      rel_ops::operator<=
      rel_ops::operator>=
      Pares e tuplas
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      Pairs and tuples
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      Troque, avançar e avançar
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      Swap, forward and move
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      Utilitários de apoio do programa
      Término do programa
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      Program termination
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      Comunicando com o meio ambiente
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      Communicating with the environment
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      getenv
      Sinais
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      Signals
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      Tipos de sinais
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      Signal types
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      Não-locais saltos
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      Non-local jumps
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      Tipos
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      Definido no cabeçalho <cstdlib>
      constchar*getenv(constchar*env_var );
      Pesquisas de uma variável ambiental com env_var nome no host especificado lista ambiente e retorna informações associada a ele. O conjunto de variáveis ​​ambientais e métodos de alterá-lo é definida pela implementação.
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      Searches for an environmental variable with name env_var in the host-specified environment list and returns information associated with it. The set of environmental variables and methods of altering it are implementation-defined.
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      Índice

      [editar]Parâmetros

      env_var -
      terminada em nulo cadeia de caracteres que identifica o nome da variável ambiental para procurar
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      null-terminated character string identifying the name of the environmental variable to look for
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      [editar]Valor de retorno

      Cadeia de caracteres que identifica o valor da variável de ambiente ou NULL se tal variável não for encontrado.
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      Character string identifying the value of the environmental variable or NULL if such variable is not found.
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      [editar]Exemplo

      #include <iostream>#include <cstdlib>   int main(int argc, char*argv[]){std::cout<<"Your PATH is: "<< std::getenv("PATH")<<std::endl;}

      Potencial saída: 

      Your PATH is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

      [editar]Veja também

      Documentação C para getenv
      Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/utility/program/getenv&oldid=24760"
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