C / C++ / MFC

Stuart Dootson wrote:

Why write your own bubble sort when the standard library has a quicksort built in.

raeiko wrote:

...but I don't know how to orgnize the bubble sort algorithm in order to compare strings and swap them.

int nNumbers[] = { 1, 7, 4, 10, 3, 5, 6, 9 };
int nCount = sizeof(nNumbers) / sizeof(nNumbers[0]);
...
BubbleSort(nNumbers, nCount);

/* Program that takes a text file as input and produces an output file that has all the original lines in alphabetical order */

#include <stdio.h>
#include <string.h>
#define SIZE 30

int main()
{
    char name[ SIZE ]; /* Data records */
    
    FILE *fpPtr; /* fpPtr = sorted_file.txt pointer */
    
    /* fopen opens file; exits program if file cannot be opened */
    if ( ( fpPtr = fopen( "sorted_file.txt", "r" ) ) == NULL ) {
        printf( "File could not be opened\n" );
    } /* End if */
    
    /* Read records from file */
    else {
        printf( "%s\n", "Name" );
        fscanf( fpPtr, "%s", name );
        
        /* While not end of file */
        while( !feof( fpPtr ) ) {
                printf( "%s\n", name );
                fscanf( fpPtr, "%s", name );
        } /* End while */
        
        fclose( fpPtr ); /* fclose closes the file */
        
    } /* End else */

/* sort */
for ( pass = 1; pass < SIZE; pass++ ){ /* loop to cotrol passes */
		for ( counter = 0; counter < SIZE - 1; counter ++ ){  /* loop to control number of comparesons per pass */
			if ( *name [ counter ] > *name [ counter + 1 ] ) { 
				hold  = *name[ counter ]; 
                *name[ counter ] = *name[ counter + 1 ]; 
                *name[ counter + 1 ] = hold; 
            } /* End if */
		}/* end of inner for */
	}/* end of outer for */
    
    return 0; /* Indicates that the program terminated successfully */
    
} /* End Main */

1. You can't get an integer from a string by casting - use atol (that's like atof for integers)
2. You only pass the string pointer the first time you call strtok for a string. The other times, pass a null pointer

1. Replace the 'int' in the nl and nd casts by 'atol'
2. A null pointer is zero. Replace the 'string' argument in all except the first strtok call. Look at the strtok documentation[^]