1、使用c++语句对数据库进行增删改查,在使用c++中string类型时,需要把string类型转换为c中的类型,使用mysql_query函数把sql语句提交,操作成功返回0,结果会被保存到mysql对象中,操作失败会返回非0值 stringstr ="insert into tb_77 values(5,'sdmqy','h');"mysql_query(&mysql, str.c_str()); 2、调用 my...
* @brief convert a integer into string through stringstream * * @param n a integer * * @return the string form of n*/stringint2str(intn) { stringstream ss;strings; ss<<n; ss>>s;returns; }stringfloat2str(doublef) { stringstream ss;strings; ss<<f; ss>>s;returns; }/** * @brief...
插入数据 插入数据采用insert into语句来实现,如下所示: insert into student values('95001','李勇','M',20,'CS'); insert into student values('95002','刘晨','F',19,'IS'); insert into student values('95003','王敏','F',18,'MA'); insert into student values('95004','张立','M',18,...
AI代码解释 #include<stdio.h>#include<string.h>intmain(){char buffer[256];FILE*pFile;pFile=tmpfile();do{if(!fgets(buffer,256,stdin))break;fputs(buffer,pFile);}while(strlen(buffer)>1
return 1; } printf("Name:%s\n", name->valuestring); cJSON *age = cJSON_GetObjectItem(root,"age"); if (age == NULL){ fprintf(stderr,"Failed to get age\n"); cJSON_Delete(root); return 1; } printf("Age:%d\n", age->valueint); cJSON *hobbies...
#include <stdio.h>#include <string.h>int main (){char buffer [256];FILE * pFile;pFile = tmpfile ();do {if (!fgets(buffer,256,stdin)) break;fputs (buffer,pFile);} while (strlen(buffer)>1);rewind(pFile);while (!feof(pFile)) {if (fgets (buffer,256,pFile) == NULL) break;fput...
string content from UNICODE string (converts to TCHAR) const CString& operator=(LPCWSTR lpsz); // copy string content from unsigned chars const CString& operator=(const unsigned char* psz); // string concatenation // concatenate from another CStringCls const CString& operator+=(const CUIString...
string query = "INSERT INTO myTable (column1, column2) VALUES (@value1, @value2)";SqlCommand command = new SqlCommand(query, connection);command.Parameters.AddWithValue("@value1", "some value");command.Parameters.AddWithValue("@value2", 123);command.ExecuteNonQuery();connection.Close();} ...
static void Main(string[] args){ usingvar con = newNpgsqlConnection("PORT=15400;DATABASE=mydb;HOST=192.168.86.219;PASSWORD=Abc@1234;USER ID=myuser");con.Open();var sql = "SELECT version()";usingvar cmd = new NpgsqlCommand(sql, con);var version = cmd.ExecuteScalar().ToString();Co...
lltoa() — Convert long long into a string localdtconv() — Date and time formatting convention inquiry localeconv() — Query numeric conventions localtime(), localtime64() — Convert time and correct for local time localtime_r(), localtime64_r() — Convert time value to broken-do...