CareerCup

void truncate(char str[]){

int read=0,write=0;

//one extra for NULL, this is the max size if no extra spaces found
char buffer[strlen(str)+1];

while(str[read]){
if(str[read++] == ' '){
buffer[write++]=' ';
while(str[read]== ' ')
read++;
}
else{
buffer[write++]=str[read++];
}
}
buffer[write]='\0';
strcpy(str,buffer);
}

i have corrected bugs in the above code...

void truncate(char str[]){

 int read=0,write=0;
 //one extra for NULL, this is the max size if no extra spaces found
 char buffer[strlen(str)+1];

 while(str[read]){
   if(str[read] == ' '){
     buffer[write++]=' ';
     while(str[read] && str[read]== ' '){       
       read++;
	 }
   }
   else{
     buffer[write++]=str[read++];
   }
 }
 buffer[write]='\0';
 strcpy(str,buffer);
}

void truncate(char* str){
	char* res;
	int i=0,j=0;
	int flag=1;
	while(str[i]){
		if(str[i]=' ' && flag=1){
			res[j++]=str[i++];
			flag=0;
		}
		else{
			res[j++]=str[i++];
			flag=1;
		}
	}
}

char* truncateExtraSpaceBetweenWords( char* str )
{
  if (!str) return NULL;
  if (!*str) return str;
  char* ans = str;
  int i = 0, j = 0;
  
  while (1)
  {
    while(str[i] && str[i] == ' ') // remove all leading spaces
      i++;

    if (!str[i])
    {
      if (j == 0)str[j++] = ' ';
      else if (str[j-1] == ' ') j--; // remove tailing spaces
      str[j] = '\0';
      return ans;
    }

    // move forward till you find non-space characters
    while(str[i] && str[i] != ' ')
    {
      str[j++] = str[i++];
    }
    if (!str[i])
    {
      str[j] = '\0';
      return ans;
    }
    else
    {
      str[j++] = str[i++]; // = ' '
    }
  }
}

just function...strtok suffices the requirement.

char str[] ="This a sample string . ";
char *pch,*s;
pch = strtok (str," ");
while (pch != NULL)
{
concat(s,pch);
pch = strtok (NULL," ");
}
cout<<s;

package com.careercup;



public class TruncateConsecutiveSpaces_2991 {
	public static void main(String[] args){
		String stringToRidOfSpaces = "";
		StringBuilder outputString = new StringBuilder();
		stringToRidOfSpaces = "abc   abc def";
		int counter = 0;
		char lastChar = '\0';
		while(counter<stringToRidOfSpaces.length()){
			char currentChar = stringToRidOfSpaces.charAt(counter);
			if(lastChar == ' ' &&  currentChar == ' '){
				System.out.println("Getting rid of this");
			} else {
				outputString.append(currentChar);
			}
			lastChar = currentChar;
			counter++;
		}
		System.out.println(">>"+outputString+"<<");
	}
}