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  1. /* Write a Program to remove the trailing blanks and tabs from each input line
  2.   and to delete entirely blank lines */
  3.  
  4. #include<stdio.h>
  5. #define MAXLINE 1000
  6.  
  7. int mgetline(char line[],int lim);
  8. int removetrail(char rline[]);
  9.  
  10. int main(void)
  11. {
  12.   int len;
  13.   char line[MAXLINE];
  14.  
  15.   while((len=mgetline(line,MAXLINE))>0)
  16.     if(removetrail(line) > 0)
  17.       printf("%s",line);
  18.  
  19.   return 0;
  20. }
  21.  
  22. int mgetline(char s[],int lim)
  23. {
  24.   int i,c;
  25.  
  26.   for(i=0;i<lim-1 && (c=getchar())!=EOF && c!='\n';++i)
  27.     s[i] = c;
  28.   if( c == '\n')
  29.   {
  30.     s[i]=c;
  31.     ++i;
  32.   }
  33.   s[i]='\0';
  34.  
  35.   return i;
  36. }
  37.  
  38. /* To remove Trailing Blanks,tabs. Go to End and proceed backwards removing */
  39.  
  40. int removetrail(char s[])
  41. {
  42.   int i;
  43.  
  44.   for(i=0; s[i]!='\n'; ++i)
  45.     ;
  46.   --i;  /* To consider raw line without \n */
  47.  
  48.   for(i >0; ((s[i] == ' ') || (s[i] =='\t'));--i)   
  49.     ; /* Removing the Trailing Blanks and Tab Spaces */
  50.  
  51.   if( i >= 0) /* Non Empty Line */
  52.   {
  53.     ++i;
  54.     s[i] = '\n';
  55.     ++i;
  56.     s[i] = '\0';
  57.   }
  58.   return i;
  59. }
Success #stdin #stdout 0s 4388KB
comments (?)
stdin
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This Is Not    True.

That    Is True.
stdout
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This Is Not    True.
That    Is True.
https://ideone.com/MLqSzL
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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