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

void replace(char * o_string, char * s_string, char * r_string) {
      char buffer[1024];
      char * ch;
      if(!(ch = strstr(o_string, s_string)))
              return;
    strncpy(buffer, o_string, ch-o_string);
      buffer[ch-o_string] = 0;
    sprintf(buffer+(ch - o_string), "%s%s", r_string, ch + strlen(s_string));
      o_string[0] = 0;
      strcpy(o_string, buffer);
      return replace(o_string, s_string, r_string);
 }

int main()
{
    MYSQL *pConn;
    MYSQL_RES *pRes;
    MYSQL_ROW aRow;
    MYSQL_FIELD *field;
    int nfields, iCounter;
    pConn = mysql_init(NULL);
    char aPassword[1024]="";    
    if (pConn == NULL){
            printf("Error %u: %s\n", mysql_errno(pConn), mysql_error(pConn));
              exit(1);
        }
    if(mysql_real_connect(pConn, 0, "root",aPassword,"data",0,NULL,0) == NULL){
        printf("Error %u: %s\n", mysql_errno(pConn), mysql_error(pConn));
             exit(1);
        }       
    char *info;
    printf("Content-type:text/html\n\n");
    printf("<html><body>"); 
    info = getenv("QUERY_STRING");
    char sub[20]="";
    int nsub;
    char teacher[20]="";
    char room[20]="";
    int nroom;
    int count=0;    
    char *token;
    char arr[5][20];
    char data[1024];
    char aCommand[1024];
    char data2[1024];
    replace(info,"%20"," ");
    replace(info,"name=","");
    token = strtok(info, " ");
    while(token!=NULL){
        strcpy(arr[count],token);   
        count++;
        token = strtok(NULL," ");
    }
    if(count==5){
        strcat(arr[0]," ");     
        strcat(arr[0],arr[1]);
        strcpy(sub,arr[0]);
        strcpy(teacher,arr[2]);
        strcat(arr[3]," ");     
        strcat(arr[3],arr[4]);
        strcpy(room,arr[3]);
    }
    if(count==4){
        strcat(arr[0]," ");     
        strcat(arr[0],arr[1]);
        strcpy(sub,arr[0]);
        strcpy(teacher,arr[2]);
        strcpy(room,arr[3]);

    }
    strcat(teacher," ");
    strcat(teacher,room);
    strcat(sub," ");
    strcat(sub,teacher);
    puts(sub);
    sprintf(aCommand,"select * from Schedule");
    mysql_query(pConn, aCommand);
    pRes = mysql_store_result(pConn);
    nfields = mysql_num_fields(pRes);   
    while ((aRow = mysql_fetch_row(pRes))){
        if(strncmp(aRow[2],sub,strlen(sub)-1)==0)
            puts("YS");
        else
            puts("NO");
    }   

    mysql_free_result(pRes);
    mysql_close(pConn);
    printf("</body></html>");
    return 0;
}

这就是整个代码。我不知道问题出在哪里。在我解析查询字符串并显示它们之后，似乎该字段和解析的字符串是相等的。但是我一直在尝试使用strcmp，但它们就是行不通。可能是什么错误？

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1 回答 1

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我发现了问题。我尝试使用strstr查找仅与 MySQL 表中的数据匹配的字符串。它与整个字符串不匹配，所以我只是修改了程序。我没有匹配整个字符串，而是使用了字符串的一部分来匹配表中的数据。

于 2013-08-30T03:29:23.720 回答