Thread: Command Line Arguments in C

I need to enter 5 words and then sort them alphabetically. The words are zebra, chimpanzee, dog, cat and buffalo. So far I have this, but I don't know how to call the words. Any ideas, help, suggestions, etc would be appreciated!

Code:

#include <stdio.h>
#include <string.h>      

 
int main(int argc, char *argv[5]) {               
    int i = 0;                                   
	int j;
       
     for (i = 0; i < argc; i++) {
        printf("argv[%d] = %s\n", i, argv[i]);
    }
 int main(void);

 int name;
 int hold;
 int last;

	for (i = last ; i > 0 ; i--)  {
         for (j = 1 ; j <= i ; j++)
            if (strcmp(name[j],name[j - 1]) < 0) {
               strcpy(hold,name[j]); 
               strcpy(name[j],name[j - 1]);
               strcpy(name[j - 1],hold);
			}
	printf("%s\n", name[0]); 
	}
	    return 0;                                     
}

Some problems:

Code:

int main(void);

What is this doing here? Delete this line.

Code:

if (strcmp(name[j],name[j - 1]) < 0) {

strcmp compares strings, but you are passing in... well I'm not sure what you are passing in since you are attempting to subscript an integer here.

This is how you would compare 2 strings:

Code:

int cmp = strcmp(argv[1], argv[2]);

That should give you a hint on how to proceed.

Thank you!

you can use two functions for sort and print array with strings

Code:

#include <stdio.h>
#include <string.h>
#define MAXLINE  1000   /* maximal length of a line */

/* SortLines:  sort lines for nlines alphabetically */
void SortLines(char lines[][MAXLINE], unsigned nlines)
{
    int i, j;
    char tmp[MAXLINE];
    
    for (i = 0; i < nlines; i++)
        for (j = i+1; j < nlines; j++)
            if (strcmp(lines[i], lines[j]) > 0) {
                strcpy(tmp, lines[i]);
                strcpy(lines[i], lines[j]);
                strcpy(lines[j], tmp);
            }
}

/* PrintLines:  print lines for nlines */
void PrintLines(char lines[][MAXLINE], unsigned nlines)
{
    int i;
    
    for (i = 0; i < nlines; i++)
        printf("%s\n", lines[i]);
}

but I recommend you to copy args first to temporary array for use them by it and sort only this array, not the arglist

Originally Posted by Snafuist

There's no need to come up with bubblesort since C already has qsort(), which yields much better asymptotic runtime in the average case and works perfectly well on arrays.

Greets,
Philip

Have you considered the fact that this is probably a homework assignment?

when you write without qsort, you can translate the code to another languages
there is exchange sort (not bubble)

Mk27,

Originally Posted by my

algorithms like binary-search or something else

......dup......

First off, do you have to input the words and store them in an array or are each words assigned to an index of an array from the get go?