1 no

#include <ctype.h>
#include <stdio.h>
#include <string.h>
void keyword(char str[10]) {
  if (strcmp("for", str) == 0 || strcmp("while", str) == 0 ||
      strcmp("do", str) == 0 || strcmp("int", str) == 0 ||
      strcmp("float", str) == 0 || strcmp("char", str) == 0 ||
      strcmp("double", str) == 0 || strcmp("static", str) == 0 ||
      strcmp("switch", str) == 0 || strcmp("case", str) == 0)
    printf("\n%s is a keyword", str);
  else
    printf("\n%s is an identifier", str);
}

int main() {
      FILE *f1, *f2, *f3;
      char c, str[10], st1[10];
      int num[100], lineno = 0, tokenvalue = 0, i = 0, j = 0, k = 0;
      f1 = fopen("input", "r");
      f2 = fopen("identifier", "w");
      f3 = fopen("specialchar", "w");
      while ((c = getc(f1)) != EOF) {
        if (isdigit(c)) {
          tokenvalue = c - '0';
          c = getc(f1);
          while (isdigit(c)) {
            tokenvalue *= 10 + c - '0';
            c = getc(f1);
          }
          num[i++] = tokenvalue;
          ungetc(c, f1);
        } else if (isalpha(c)) {
          putc(c, f2);
          c = getc(f1);
          while (isdigit(c) || isalpha(c) || c == '_' || c == '$') {
            putc(c, f2);
            c = getc(f1);
          }
          putc(' ', f2);
          ungetc(c, f1);
        } else if (c == ' ' || c == '\t')
          printf(" ");
        else if (c == '\n')
          lineno++;
        else
          putc(c, f3);
      }
      fclose(f2);
      fclose(f3);
      fclose(f1);
      printf("\nThe numbers in the program are ");
      for (j = 0; j < i; j++)
        printf("%d ", num[j]);
      printf("\n");
      f2 = fopen("identifier", "r");
      k = 0;
      printf("The keywords and identifiersare: ");
      while ((c = getc(f2)) != EOF) {
        if (c != ' ')
          str[k++] = c;
        else {
          str[k] = '\0';
          keyword(str);
          k = 0;
        }
      }
      fclose(f2);
      f3 = fopen("specialchar", "r");
      printf("\nSpecial characters are ");
      while ((c = getc(f3)) != EOF)
      printf("%c ", c);
      printf("\n");
      fclose(f3);
      printf("Total number of lines are:%d", lineno);
      return 0;
}

/*
Input
#include <stdio.h>
int main() {

    int number1, number2, sum;

    printf("Enter two integers: ");
    scanf("%d %d", &number1, &number2);

    // calculating sum
    sum = number1 + number2;

    printf("%d + %d = %d", number1, number2, sum);
    return 0;
}
*/