Remove all extra blank spaces from given string

Posted on Apr 22, 2020

C program to remove all extra blank spaces from given string.

Program

#include<stdio.h>
#include<conio.h>
#include<string.h>
#define MAX 50

void remove_extra_spaces(char str[MAX], char words[MAX][MAX])
{
    int i, j, len;
    char prev_char;

    prev_char = '\0';
    len = strlen(str);

    for(i=0;i<len;i++)
    {
        if(str[i] == '\t')
        {
            str[i] = ' ';
        }
    }

    i = 0;

    while(1)
    {
        if(str[i] == ' ')
        {
            if(prev_char==' ')
            {
                for(j=i;j<len;j++)
                {
                    str[j] = str[j+1];
                }
                len--;
                str[len] = '\0';
                i--;
            }
            else
            {
                prev_char = str[i];
            }
        }
        else
        {
            prev_char = str[i];
        }

        if(str[i] == '\0')
            break;
        else
            i++;
    }

    printf("\nModified string\t:%s",str);
}

void main()
{
	char str[MAX];
    char words[MAX][MAX];

    printf("Enter the string\t:");
    gets(str);

    remove_extra_spaces(str, words);

    getch();
}

Output

Enter the string        :welcome         to       coursecrux.com,  happy   coding!!!

Modified string :welcome to coursecrux.com, happy coding!!!