#include<stdio.h>
int main()
{
char *p="i am working in TechM";
char *s,*temp;
char a[20];
int i=0;
s=p;
while(*p != '\0')
p++;
while(s != p){
while(*(--p)!=' ');
temp=p;
p++;
while(*p != '\0' && *p != ' ')
{
a[i++]=*p;
p++;
}
a[i++]=' ';
p=temp;
p--;
}
while(*s != ' ')
a[i++]=*s++;
a[i] = '\0';
printf("%s \n",a);
}
~

#include <stdio.h>

void reverse_string ( char* cp_string, int start, int end )
{
	if ( cp_string && ( start < end ) ) {
		*( cp_string + start ) ^= *( cp_string + 
end  ) 
			^=  *( cp_string + start ) ^= *( 
cp_string + end );
		reverse_string ( cp_string, ++start, --
end ); 
	}
}


int main ( int argc, char* argv [] )
{
	char ca_array [12]={"Hello World"};
	char* cp_ptr = NULL;
	char* cp_ptr_temp = NULL;
	
	printf ( "\n Before Reverse :%s", ca_array );

	reverse_string ( ca_array, 0, strlen ( ca_array ) -
1 );

	cp_ptr_temp = cp_ptr = ca_array;
	while ( NULL != ( cp_ptr_temp = (char*) strchr ( 
cp_ptr_temp, ' ' ) ) ) {
		reverse_string ( cp_ptr, 0, ( cp_ptr_temp - 
cp_ptr ) - 1 );
		cp_ptr = ++cp_ptr_temp;
	}
	// change the final word
	reverse_string ( cp_ptr, 0, 
			( ( strlen ( ca_array ) - 1 ) - ( 
cp_ptr - ca_array ) ) );

	printf ( "\n After Reverse by Words :%s", 
ca_array );
	return ( 0 );
}

#include <stdafx.h>
#include <string.h>

char* ReverseString(char *a){

 int length = strlen(a);
 printf("length is:%d\n",length);
 int i=0;
 int j=length-1;
 while(i<j){
	 *(a+i)=*(a+i)^*(a+j);
	 *(a+j)=*(a+i)^*(a+j);
	 *(a+i)=*(a+i)^*(a+j);
	 i++;
	 j--;
 }
 
 return a;
}

int main()
{
 char s[] = "katrina kaif is gorgeous gal!"; 
 char *a=s;
 char *b=s;
 char *e= a+strlen(a);
 printf("String is:%s\n",a);
 ReverseString(a);
 printf("NewString is:%s\n",a);
 int i=0;
 while(*(a+i)!='\0'){
	 while(*(a+i)!=' ' && *(a+i)!='\0') i++;
		*(a+i)='\0';
		ReverseString(a);
		
		if((a+i)!=e){
			*(a+i)=' ';
			a = a+i+1;
		}
		else{
			break;
		}
		i=0;
 }
 printf("FinalString is:%s\n",b);
 getchar();