c++ - openssl API 的 G++ 编译错误

Question

我在使用 G++ 编译器编译 openssl 函数以从公共(public)证书获取到期日期时遇到问题。

错误是，

error: expected unqualified-id before ‘not’ token
error: expected primary-expression before ‘)’ token 

编译过程，

g++  main.c -o test -I /usr/include/openssl/ -lcrypto -lssl

包含所有头文件。

下面的代码是我编译的，

 main ()
{
        X509 *x;

        int n=0;

        unsigned char *not;            //expected unqualified-id before ‘not’ token ,expected initializer before ‘not’ token
        BIO *out;
        FILE *fp=fopen("/home/public.cer", "r");

        x = X509_new();
        x = PEM_read_X509(fp,NULL,NULL,NULL);
        fclose(fp);

        out = BIO_new(BIO_s_mem());
        ASN1_TIME_print(out, X509_get_notAfter(x));//expected primary-expression before ‘)’ token
        n = BIO_get_mem_data(out, &not);
        expiryStr = (char *) malloc (n+1);
        expiryStr[n] = '\0';
        memcpy(expiryStr, not, n);//expected primary-expression before ‘)’ token
    printf("Expiry Date====================%s\n",expiryStr);
        BIO_free(out);

        X509_free(x);        
}

请帮我解决这个错误。

Answer 1

“not”是 C++ 中的关键字:http://en.cppreference.com/w/cpp/keyword .您必须重命名该变量。