linux_connect_mysql

  原文来自 https://www.cnblogs.com/lywy510/p/3615710.html

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <mysql/mysql.h>

MYSQL *g_conn;
MYSQL_RES *g_res;
MYSQL_ROW g_row;

#define MAX_BUF_SIZE 1024

const char *g_host_name = "localhost";
const char *g_user_name = "root";
const char *g_password = "Ll123456..";
const char *g_db_name = "c_test";
const unsigned int g_db_port = 3306;

void print_mysql_error(const char *msg) {
    if (msg) 
        printf("%s:%s
",msg,mysql_error(g_conn));
    else 
        puts(mysql_error(g_conn));
}

int executesql(const char *sql) {
    if (mysql_real_query(g_conn,sql,strlen(sql))) 
        return -1;
    
    return 0;
}

int init_mysql() {
    g_conn = mysql_init(NULL);
    if (!mysql_real_connect(g_conn,g_host_name,g_user_name,g_password,g_db_name,g_db_port,NULL,0))
        return -1;
    
    return 0;
}

int main() 
{
    printf("hello world
");
    if (init_mysql())
        print_mysql_error(NULL);
    char sql[MAX_BUF_SIZE];
    if (executesql(sql))
        print_mysql_error(NULL);
    if (executesql("select * from user;"))
        print_mysql_error(NULL);

    g_res = mysql_store_result(g_conn); 
    int iNum_rows = mysql_num_rows(g_res); 
    int iNum_fields = mysql_num_fields(g_res);
    printf("line = %d	 constent = %d
", iNum_rows, iNum_fields);
    puts("id	name
");

    while ((g_row=mysql_fetch_row(g_res))) 
        printf("%s	%s
", g_row[0], g_row[1]);

    mysql_free_result(g_res);
    mysql_close(g_conn);
    return 0;
}

编译命令

mysql 库文件自己找一下, 一般会使 mysql-dev.....

希望对你有用