fork(3) download
copy 
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <ctype.h>
  5.  
  6. int check(char c, char che[]);
  7. int is_enum(char* c, int beg, int end);
  8. int is_log(char* c, int beg, int end);
  9.  
  10.  
  11. int main()
  12. {
  13.     char* c = "nota";
  14.     int l = strlen(c);
  15.     if (is_log(c, 0, l - 1)) printf("Logical expression was arranged correctly");
  16.     else printf("Logical expression wasn't arranged correctly");
  17.     return 0;
  18. }
  19.  
  20.  
  21. int check(char c, char che[]) {
  22.     int l = strlen(che);
  23.     int n = 0;
  24.     for (int i = 0; i < l; i++) {
  25.         if (c == che[i]) {
  26.             n++;
  27.             break;
  28.         }
  29.     }
  30.     return n;
  31. }  /*проверка вхождения символа в массив*/
  32.  
  33.  
  34. int is_enum(char* c, int beg, int end) {
  35.     int n, p, j, k , nbeg;
  36.     char op[] = "+-*/";
  37.     if ((beg == end) && isalnum(c[beg])) return 1;
  38.     if ((isalnum(c[beg]) != 0) && (check(c[beg + 1], op) != 0)) return is_enum(c, beg + 2, end);
  39.     if (c[beg] == '(') {
  40.             p = 0;
  41.             for (int i = 0; i <= end; i++) {
  42.                 if (c[i]  == '(') p++;
  43.                 if (c[i] == ')') p--;
  44.                 if (p == 0) {
  45.                     k = i + 1;
  46.                     nbeg = i + 2;
  47.                     break;
  48.                 }
  49.             }
  50.             if (c != 0) return 0;
  51.             if (k < end) {
  52.                 if (check(c[k], op)) return is_enum(c, beg + 1, k - 2) * is_enum(c, nbeg, end);
  53.             }
  54.             else {
  55.                 return is_enum(c, beg + 1, k - 2);
  56.             }
  57.         }
  58.         return 0;
  59. } /*проверка выражений*/
  60.  
  61. int is_log(char* c, int beg, int end) {
  62.     if (check(c[beg], "TtFf")) return 1;
  63.     if (check(c[beg], "Aa") && check(c[beg + 1], "Nn") && check(c[beg + 2], "Dd")) return is_enum(c, beg + 3, end);
  64.     if (check(c[beg], "Nn") && check(c[beg + 1], "Oo") && check(c[beg + 2], "Tt")) return is_enum(c, beg + 3, end);
  65.     if (check(c[beg], "Oo") && check(c[beg + 1], "Rr")) return is_enum(c, beg + 2, end);
  66.     return 0;
  67. }
Success #stdin #stdout 0s 9424KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Logical expression was arranged correctly
https://ideone.com/pzUqxO
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!