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POAbnormal program termination error accessing elements while using vector inside a vector in c++
 

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  1. POAbnormal program termination error accessing elements while using vector inside a vector in c++
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    <p>I have the following code: (please pardon the length of this code). I am trying to access elements of a vector within a vector. table_info* get_table_info function gets the values of the table_info vector for a particular table. When I try to check the values of column_info vector, I an encountering a strange error, where the program suddenly terminates.</p> <pre><code>typedef struct _column_info { char name[20]; // columns name int type; // 0:INT, 1: CHAR int size; int offset; // start position } column_info; typedef struct _table_info { char name[20]; int column_count; char columns[100]; vector &lt;column_info&gt; col; //col[0], col[1]... char primary_key[5]; int recordsize; int totalsize; int records; } table_info; vector &lt;table_info&gt; v; void create_table(char* tablename, struct columns *cc , int num_col, char* pkey) { char* new_columns; new_columns = (char*)malloc(256*sizeof(char)); strcpy(new_columns,""); int len = 0; len = num_col; for ( int i=0 ; i &lt; len ; i++ ) { strcat(new_columns, cc[i].c_name); strcat(new_columns, ":"); strcat(new_columns, cc[i].c_type); if ( strcmp(cc[i].c_type,"char") == 0 ) { strcat(new_columns, "("); strcat(new_columns, cc[i].c_size); strcat(new_columns, ")"); record_size = record_size + atoi(cc[i].c_size); } else record_size = record_size + 4; if( i != (len-1) ) strcat(new_columns, ","); } table_info new_table; strcpy(new_table.name, tablename); strcpy(new_table.columns, new_columns); strcpy(new_table.primary_key, pkey); new_table.recordsize = record_size; new_table.totalsize = 0; new_table.records = 0; v.push_back(new_table); column_info cols; int offset = 0; for(int x=0;x&lt;num_col;x++) { strcpy(cols.name, cc[x].c_name); if ( strcmp(cc[x].c_type,"char") == 0 ) cols.type = 1; else cols.type = 0; cols.size = atoi(cc[x].c_size); cols.offset = offset; offset += cols.size; new_table.col.push_back(cols); } table_info* table_info; table_info = get_table_info(tablename); int offset2=0; int size2 = 0; for (int i = 0; i &lt; num_col ; i++) { offset2 = table_info-&gt;col.at(i).offset; // ERROR: ABNORMAL PROGRAM TERMINATION printf("offset:%d\n",offset2); size2 = table_info-&gt;col.at(i).size; } } table_info* get_table_info(const string&amp; tablename) { printf("table info \n"); for (int i = 0; i &lt; (int) v.size(); i++) { if (strcmp(v.at(i).name, tablename.c_str()) == 0) return &amp;v.at(i); } return NULL; } </code></pre> <p>Any idea why this program terminates? Please help.</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POAbnormal program termination error accessing elements while using vector inside a vector in c++
      1. This table or related slice is empty.
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    1. COI assume this is on Windows? I think "abnormal program termination" is an uncaught exception, probably thrown by `vector::at` because `i` is out of range. Whatever it is however, it can probably be fixed easily with a debugger.
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      1. POAbnormal program termination error accessing elements while using vector inside a vector in c++
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    2. COYes this is on windows, and I did try to debug using eclipse.But the debugger just suddenly stopped at the line. The value of num_col is okay. I have checked it, so I dont think it is because the value of i is out of bounds. Any other suggestions would really help.
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      1. POAbnormal program termination error accessing elements while using vector inside a vector in c++
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