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  1. #include <stdio.h>
  2. #include <unistd.h>
  3. #include <stdlib.h>
  4. #include <string.h>
  5. #include <pthread.h>
  6.  
  7. char alphabet[26] = "abcdefghijklmnopqrstuvwxyz";
  8. int count[26];
  9. pthread_mutex_t mutex;
  10.  
  11. char* sentence(char * s){
  12.     char* p;
  13.     char* q;
  14.     char* arr;
  15.     int i;
  16.     p = s;
  17.     q = malloc(100);
  18.     arr = q;
  19.     for (i=0; *p != '.'; i++){ 
  20.         *q = *p;
  21.         q++;
  22.         p++; 
  23.     }
  24.     *q = '\0';
  25.     return arr;
  26. }
  27.  
  28. char** load_sentence(char* p, char** q, int i){
  29.     q[i] = malloc(strlen(p)+1);
  30.     strcpy(q[i], p);
  31.     return q;
  32. }
  33.  
  34. void* count_letter(void * s){
  35.     pthread_mutex_lock(&mutex);
  36.     char* p = (char*) s;
  37.     int i;
  38.     for (i=0; i<26; i++){
  39.         if (*p == alphabet[i]){
  40.             count[i]++;
  41.         }
  42.     }
  43.     pthread_mutex_unlock(&mutex);
  44.     return NULL;
  45. }
  46.  
  47. void frequency(char* str){
  48.     char* s = str;
  49.     int i, j, l;
  50.     l = strlen(str);
  51.     pthread_t tid[l];
  52.     if (pthread_mutex_init(&mutex, NULL) != 0){
  53.         printf("Mutex init failed\n");
  54.         exit(1);
  55.     }
  56.     for (i=0; i<l; i++){
  57.         pthread_create(&tid[i], NULL, count_letter, (void*) s);
  58.         s++;
  59.     }
  60.     for (j=0; j<l; j++){
  61.         pthread_join(tid[j], NULL);
  62.     }
  63. }
  64.  
  65.  
  66. int main(int argc, char* argv[]){
  67.  
  68.  
  69.     int fd;
  70.     char buff[100];
  71.     char ** text = malloc(10*sizeof(char*));
  72.     scanf("%s ", buff);
  73.     printf("%s\n", buff);
  74.     char* start = buff;
  75.     int i = 0; //number of phrases!
  76.     char* p = NULL;
  77.  
  78.     while (*(p = sentence(start)) != '\0'){
  79.         text = load_sentence(p, text, i);
  80.         start += strlen(p)+1;
  81.         i++;
  82.    }
  83.  
  84.    int j, k;
  85.  
  86.    for (k=0; k<i; k++){
  87.         frequency(text[k]);
  88.    }
  89.  
  90.    for (j=0; j<26; j++){
  91.         printf("%c : %d times\n", alphabet[j], count[j]);
  92.    }
  93. }
Success #stdin #stdout 0s 42256KB
comments (?)
stdin 
aaaaaaaaa.aaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaa.
stdout 
aaaaaaaaa.aaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaa.
a : 37 times
b : 0 times
c : 0 times
d : 0 times
e : 0 times
f : 0 times
g : 0 times
h : 0 times
i : 0 times
j : 0 times
k : 0 times
l : 0 times
m : 0 times
n : 0 times
o : 0 times
p : 0 times
q : 0 times
r : 0 times
s : 0 times
t : 0 times
u : 0 times
v : 0 times
w : 0 times
x : 0 times
y : 0 times
z : 0 times
https://ideone.com/QVOALf
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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