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Link: http://codepad.org/1DT7A7IN    [ raw code | output | fork ]

C++, pasted on Apr 23:
using namespace std;

void reverse(char a[],int slen, int elen)
 {
     int start,end,temp;
     for(start=slen,end=elen;start<end;start++,end--)
            {
                temp=a[start];
                a[start]=a[end];
                a[end]=temp;
            }
 }

 void reverseall(char b[])
  {
      int b_len = strlen(b);

      int i,j,n=0,len;

      char* a = (char*)malloc((b_len + 1) * sizeof(char));
      for(i = 0; i < b_len; i++)
           a[b_len - i - 1] = b[i];
      a[b_len] = '\0';

      i=0;
      j=0;

      while(a[i]!='\0')
         {
            n++;
            i++;
         }
     
      while(j!=n)
         {
            if(j!=0)
              j++;
            len=0;
            while(a[j]!= ' ' && a[j]!='\0')
             {
                len++;
                j++;
             }
            reverse(a,j-len,j-1);
         }

     for(i=0;i<n;i++)
        cout<<a[i];

     free(a);
  }
int main()
 {
     char b[20]="hi how are you";
     reverseall(b);
     return 0;
 }


Output:
1
you are how hi


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