/* IF YOU BELIEVE THAT YOU ARE A SECURITY-FREAK CHECK THIS CODE :)) */ #include #include #define ROW 2 #define COL 5 int main( void ) { int **table, errMalloc = 0; /* allocate memory for the pointers to rows */ table = malloc( ROW * sizeof( *table ) ); if( table ) { /* dynamic number of elements */ for ( int i = 0 ; i < ROW ; i++ ) { /* Memory allocation for the number of items in each ROW */ *(table + i) = malloc( COL * sizeof( *table[i] ) ); if( *(table + i) ) { /* save a record of how many MALLOC are given */ errMalloc++; } else { /* we know how many MALLOC took place so we FREE them and set them to NULL*/ if( errMalloc ) { for( int j = 0 ; j < errMalloc ; j++ ) { free( *(table + j) ); *(table + j) = NULL; } /* FREE the table and set it to NULL*/ if( table ) { printf( "Error, malloc COL %d\n", errMalloc ); free( table ); table = NULL; exit( EXIT_FAILURE ); } } } } } else { /* No memory avaible for the Table */ printf( "Error, malloc TABLE\n" ); exit( EXIT_FAILURE ); } /* Scan for the input, if somethings goes wrong inform the User, release the memory and stop the Program */ printf( "Type 10 Numbers: " ); for ( int i = 0 ; i < ROW ; i++ ) { for ( int j = 0 ; j < COL ; j++ ) { if( ( scanf( "%d", &*(*(table + i) + j ) ) ) != 1 ) { printf( "Error, scanf\n" ); for ( int k = 0 ; k < ROW ; k++ ) { if ( *(table + k) != NULL ) { free ( *(table + k) ); *(table + k) = NULL; } } if( table ) { free ( table ); table = NULL; } printf( "Error, Scanf\n" ); exit( EXIT_FAILURE ); } } } printf( "The numbers are:\n" ); for ( int i = 0 ; i < ROW ; i++ ) { for ( int j = 0 ; j < COL ; j++ ) { printf( "%d ", *(*(table + i ) + j ) ); } printf( "\n" ); } for ( int i = 0 ; i < ROW ; i++ ) { if ( *(table + i) != NULL ) { free ( *(table + i) ); *(table + i) = NULL; } } if( table ) { free( table ); table = NULL; } printf( "\n" ); }

Malloc for Freaks.