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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<string.h>
  4. #include<ctype.h>
  5. char keywords[32][10] =
  6. {
  7.     "auto","break","case","char","const","continue","default",
  8.     "do","double","else","enum","extern","float","for","goto",
  9.     "if","int","long","register","return","short","signed",
  10.     "sizeof","static","struct","switch","typedef","union",
  11.     "unsigned","void","volatile","while"
  12. };
  13.  
  14. const char *operators[] = {"+", "-", "*", "/", "=", "==", "!=", ">", "<", ">=", "<=", "&&", "||", "++", "--"};
  15. const char *separators[] = {",", ";", "(", ")", "{", "}", "[", "]"};
  16.  
  17. int isKeyword(char buffer[])
  18. {
  19.     for(int i = 0; i < 32; ++i)
  20.     {
  21.         if(strcmp(keywords[i], buffer) == 0)
  22.         {
  23.             return 1;
  24.         }
  25.     }
  26.     return 0;
  27. }
  28.  
  29. int isOperator(char ch)
  30. {
  31.     for(int i = 0; i < sizeof(operators) / sizeof(operators[0]); ++i)
  32.     {
  33.         if(ch == operators[i][0])
  34.         {
  35.             if(strlen(operators[i]) > 1)
  36.             {
  37.                 return 2;
  38.             }
  39.             return 1;
  40.         }
  41.     }
  42.     return 0;
  43. }
  44.  
  45. int isSeparator(char ch)
  46. {
  47.     for(int i = 0; i < sizeof(separators) / sizeof(separators[0]); ++i)
  48.     {
  49.         if(ch == separators[i][0])
  50.         {
  51.             return 1;
  52.         }
  53.     }
  54.     return 0;
  55. }
  56.  
  57. int main()
  58. {
  59.     char ch, buffer[15];
  60.     FILE *fp;
  61.     int j = 0,token=0;
  62.  
  63.     fp = fopen("Firoz.txt", "r");
  64.     if(fp == NULL)
  65.     {
  66.         printf("Error opening the file\n");
  67.         exit(0);
  68.     }
  69.  
  70.     while((ch = fgetc(fp)) != EOF)
  71.     {
  72.         if(isalnum(ch))
  73.         {
  74.             buffer[j++] = ch;
  75.         }
  76.         else
  77.         {
  78.             if(j != 0)
  79.             {
  80.                 buffer[j] = '\0';
  81.                 j = 0;
  82.                 token++;
  83.                 if(isKeyword(buffer))
  84.                 {
  85.                     printf("%s is a keyword\n", buffer);
  86.                 }
  87.                 else
  88.                 {
  89.                     if(buffer[0]-'0'<= 48 || buffer[0]-'0' >= 57)
  90.                     {
  91.                         printf("%s is an not identifier\n", buffer);
  92.                     }
  93.                     else
  94.                     {
  95.                         printf("%s is an identifier\n", buffer);
  96.                     }
  97.                 }
  98.             }
  99.  
  100.             if(isOperator(ch)==1)
  101.             {
  102.                 token++;
  103.                 printf("%c is an operator\n", ch);
  104.                 if(isOperator(ch) == 2)
  105.                 {
  106.                     printf("Multi-character operator detected\n");
  107.                 }
  108.             }
  109.  
  110.             if(isSeparator(ch))
  111.             {
  112.                 token++;
  113.                 printf("%c is a separator\n", ch);
  114.             }
  115.         }
  116.     }
  117.     printf("%d",token);
  118.     fclose(fp);
  119.     return 0;
  120. }
  121.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
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Standard input is empty
stdout
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Error opening the file
https://ideone.com/s2pmeI
language:
C (gcc 8.3)
created:
5 hours ago
visibility:
public

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