首页C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:668: error: 'printf_time' was not declared in this scope sql_query.addBindValue(printf_time); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:668: error: 'printf_time' was not declared in this scope sql_query.addBindValue(printf_time); ^

时间: 2024-04-23 14:28:30 浏览: 122

Automatic_Fingerprint_Authentication_System.zip_Cropping_64.m_ST

A novel texture-based Automatic Fingerprint Authentication System (AFAS) is proposed. A fingerprint image is preprocessed to enhance the image by Short Time Fourier Transform (STFT) analysis. Then, three sets of invariant moment features, as a kind of texture features, are extracted from three different sizes of Region of Interest (ROI) areas based on the reference point from the enhanced fingerprint image. Each set of invariant moments contain seven invariant moments. Fingerprint verification is realized by Euclidean distance between the two corresponding features of the test fingerprint image and template fingerprint image in the database.

这个错误提示表明在当前的作用域中找不到名为 `printf_time` 的变量。根据你提供的代码片段，我无法确定 `printf_time` 是如何定义和初始化的。请确保在使用 `printf_time` 变量之前，它已经被声明和赋值。如果 `printf_time` 是一个函数或全局变量，你需要确保其在当前作用域中可见。你可以检查是否在正确的位置声明了 `printf_time`。如果 `printf_time` 是一个局部变量，你需要确保其在使用之前已经被定义和初始化。你可以在相应的作用域内声明和初始化 `printf_time`。请检查你的代码，确认 `printf_time` 的定义和初始化的位置，确保它在使用之前是可见和有效的。

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C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:668: error: 'printf_time' was not declared in this scope sql_query.addBindValue(printf_time); ^

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C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:1790: error: 'sql_query' was not declared in this scope QString find_number = sql_query.value(1).toString(); //宸ュ彿 ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:591: error: 'class QByteArray' has no member named 'toLatin1' hexArray.append(QByteArray::fromHex(hex_max_id.toLatin1())); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:561: error: 'serial' was not declared in this scope serial.write(sendData); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:594: error: invalid static_cast from type 'QString' to type 'char' hexArray.append(static_cast<char>(hex_sum)); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:591: error: invalid static_cast from type 'QString' to type 'char' hexArray.append(static_cast<char>(hex_max_id)); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:593: error: no match for 'operator|' (operand types are 'QString' and 'int') hexArray.append(QByteArray::fromHex(hex_max_id | 0x00); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:593: error: within this context hexArray.append(static_cast<char>(sum)); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:569: error: expected unqualified-id before '<<' token QDebug << max_id; ^

C:\Users\23501\Desktop\5\QT\StudentManagementSystem_fingerprint\widget.cpp:1534: error: 'assert' was not declared in this scope assert(pTextCodec != nullptr); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:590: error: call of overloaded 'append(int)' is ambiguous hexArray.append(0x00); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:1035: error: ambiguous overload for 'operator=' (operand types are 'QString' and 'int') find_time = 0; ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:455: error: 'query' was not declared in this scope query.exec("insert into person vallues(101, 'Danny', 'Young')"); ^.

C:\Users\23501\Desktop\5\QT\StudentManagementSystem_fingerprint\widget.cpp:1062: error: 'uery' was not declared in this scope uery.value(0).toInt(); //ID ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:813: error: invalid conversion from 'int' to 'const char*' [-fpermissive] QByteArray dele = 1; ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:1700: error: invalid conversion from 'char' to 'const char*' [-fpermissive] page[0] = rx_data.constData()[5]; ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:596: error: invalid conversion from 'int' to 'const char*' [-fpermissive] hexArray.append(QByteArray::fromHex(sum)); ^

C:\Users\23501\Desktop\5\QT\System_fingerprint\widget.cpp:597: error: request for member 'resize' in 'sum', which is of non-class type 'int' sum.resize(2); ^

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