段錯誤 - >在std :: basic_ostream中<char，std :: char_traits <char>

-3

我在執行時遇到段錯誤。下面是代碼和bt的gdb輸出。代碼在崩潰之前一直運行到結束。衝突似乎與我的開關/箱段錯誤 - >在std :: basic_ostream中<char，std :: char_traits <char>

char *getmybuyData() 
{ 
     FILE *fp = popen("php orders.php 155", "r"); 
     if (fp == NULL) perror ("Error opening file"); 
     char buydbuff[BUFSIZ]; 
     bool more = true; 
     do { 
       vector<string> vrecords; 
       for (int i = 0; (i < 7) && (more = (fgets(buydbuff, BUFSIZ, fp) != NULL)); ++i) { 
         size_t n = strlen(buydbuff); 
         if (n && buydbuff[n - 1] == '\n') 
           buydbuff[n - 1] = '\0'; 
         //push everything into vector 
         if (buydbuff[0] != '\0') 
           vrecords.push_back(buydbuff); 
         //begine breaking down the data; 
       } 
       for (int n = 0; n < 7; ++n){ 
       switch(n){ 
         case 0: 
           cout << vrecords[0] << endl; 
         break; 
         case 1: 
           cout << vrecords[1] << endl; 
         break; 
         case 2: 
           cout << vrecords[2] << endl; 
         break; 
         case 3: 
           cout << vrecords[3] << endl; 
         break; 
         case 4: 
           cout << vrecords[4] << endl; 
         break; 
         case 5: 
           cout << vrecords[5] << endl; 
         break; 
         case 6: 
           cout << vrecords[6] << endl; 
         break; 
         case 7: 
           cout << vrecords[7] << endl; 
         break; 
         default: 
           //cout << "Hello World" << endl; 
         break; 
       } 
       } 

     } while (more); 
}

輸出：

198397652 
2014-11-14 15:10:10 
Buy 
0.00517290 
0.00100000 
0.00100000 
0.00000517 
198397685 
2014-11-14 15:10:13 
Buy 
0.00517290 
0.00100000 
0.00100000 
0.00000517 
198398295 
2014-11-14 15:11:14 
Buy 
0.00517290 
0.00100000 
0.00100000 
0.00000517 
203440061 
2014-11-21 16:13:13 
Sell 
0.00825550 
0.00100000 
0.00100000 
0.00000826 
Segmentation fault

GDB輸出： enter link description here

來源

2014-11-23 bro

函數的* line *是指向哪個堆棧跟蹤（也就是第45行）？ – 2014-11-23 12:49:13

你的'案例7'永遠不會被執行，'default'也不會被執行。 – 2014-11-23 12:50:06

[在過去48小時內]發佈此任務上的問題（http://stackoverflow.com/users/4272671/bro?tab=questions）將提示您可能需要對語言基礎進行審查。該輸出for循環有點證實了這一觀察。 – WhozCraig 2014-11-23 13:05:14

你的代碼來填充向量不保證會有7條目，但你的代碼打印他們假設有。

來源

2014-11-23 12:51:46

段錯誤 - >在std :: basic_ostream中<char，std :: char_traits <char>

回答

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