EOS.IO C语言API手册

Action
action结构 read_action_data action_data_size require_recipient has_auth require_auth require_auth2 send_inline send_context_free_inline require_write_lock require_read_lock publication_time current_receiver
Chain
get_active_producers
Console
prints prints_l printi printui printi128 printui128 printsf printdf printqf printn printhex
Crypto
assert_sha256 assert_sha1 assert_sha512 assert_ripemd160 sha256 sha1 sha512 ripemd160 recover_key assert_recover_key
Database
db_store_i64 db_update_i64 db_remove_i64 db_get_i64 db_next_i64 db_previous_i64 db_find_i64 db_lowerbound_i64 db_upperbound_i64 db_end_i64 db_idx64_store db_idx64_update db_idx64_remove db_idx64_next db_idx64_previous db_idx64_find_primary db_idx64_find_secondary db_idx64_lowerbound db_idx64_upperbound db_idx64_end
System
eosio_assert eosio_assert_message eosio_assert_code eosio_exit current_time now
Transaction
send_deferred cancel_deferred read_transaction transaction_size tapos_block_num tapos_block_prefix expiration get_action get_context_free_data
Privileged
set_resource_limits set_proposed_producers set_active_producers is_privileged set_privileged set_blockchain_parameters_packed get_blockchain_parameters_packed activate_feature
Memory
malloc calloc realloc free
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  4. printdf

printdf

打印输出双精度浮点数，例如double类型的数。

参数

要打印输出的双精度数值。

示例代码

double value = 5.0 / 10.0;
printdf(value); // Output: 0.5