Question

How to count the occurrences of all words in text file with C

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define LEN 20
#define TOTALWORDS 300

int countOccurrencesAllWords(char file[], char words[][LEN], int count[]) {
    FILE *fp = fopen(file, "r");  
	
	if (fp == NULL) {
        printf("Error open file\n");
        exit(EXIT_FAILURE);
    }
	
	int wordindex = 0;
    char word[20] = "";
    while (fscanf(fp, "%s", word) != EOF) {
		int i;
        int notInArray = 1;
        for (i = 0; i < wordindex && notInArray; i++) {
            if (strcmp(words[i], word) == 0) {
                notInArray = 0;
			}
        }
        if (notInArray) {
            strcpy(words[wordindex], word);
            count[wordindex]++;
            wordindex++;
        }
        else {
            count[i - 1]++;
        }
    }

	fclose(fp);

	return wordindex; // totalwords
}
    
void readFile(char file[]) {
    FILE *fp = fopen(file, "r");
           
    char ch;
    while ((ch = fgetc(fp)) != EOF)
        putchar(ch);
    
    fclose(fp);
}
      
int main()
{
    char file[100] = "d:\\data.txt";
    char words[TOTALWORDS][LEN] = {"", ""};
	int count[TOTALWORDS] = { 0 };
	
	readFile(file);
	puts("\n");
	
	int totalwords = countOccurrencesAllWords(file, words, count);
	
	for (int i = 0; i <  totalwords; i++) {
       printf("%s: %d times\n", words[i], count[i]);
    }    
		
	return 0;
}
       
         
         
         
/*
run:
         
c cpp python csharp
php java c python
javascript python php

c: 2 times
cpp: 1 times
python: 3 times
csharp: 1 times
php: 2 times
java: 1 times
javascript: 1 times
      
*/

 

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