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  1. #include <stdio.h>
  2. #include <string.h>
  3. void main() {
  4.  char input[100], l[50], r[50], temp[10], tempprod[20], productions[25][50];
  5.  int i = 0, j = 0, flag = 0, consumed = 0;
  6.  printf("Enter the productions: ");
  7.  scanf("%1s->%s", l, r);
  8.  printf("%s", r);
  9.  while (sscanf(r + consumed, "%[^|]s", temp) == 1 && consumed <= strlen(r)) {
  10.  if (temp[0] == l[0]) {
  11.  flag = 1;
  12.  sprintf(productions[i++], "%s->%s%s'\0", l, temp + 1, l);
  13.  } else {
  14.  sprintf(productions[i++], "%s'->%s%s'\0", l, temp, l);
  15.  }
  16.  consumed += strlen(temp) + 1;
  17.  }
  18.  if (flag == 1) {
  19.  sprintf(productions[i++], "%s->ε\0", l);
  20.  printf("The productions after eliminating Left Recursion are:\n");
  21.  for (j = 0; j < i; j++)
  22.  printf("%s\n", productions[j]);
  23.  } else {
  24.  printf("The Given Grammar has no Left Recursion");
  25.  }
  26. }
Success #stdin #stdout #stderr 0.03s 6892KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/QjUPcy/prog:26:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/jfU9XX
language:
Prolog (swi 7.6.4)
created:
3 days ago
visibility:
public

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