word count Archives - C Program Examples

K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. How would you test the word count program? What kinds of input are most likely to uncover bugs if there are any?. Read more about C Programming Language .

To test the word count program try some of the following inputs: 

1. input file contains zero words , output should be 0, 0, 0.
2. input file contains 1 enormous word without any newlines 
3. input file contains all white space without newlines 
4. input file contains 66000 newlines 
5. input file contains word
{huge sequence of white space of different kinds}/word 
6. input file contains 66000 single letter words,
 66 to the line 
7. input file contains 66000 words without any newlines 


Some boundary conditions are:
-no input
-no words--just new lines
-no words--just blanks,tabs, and new lines
-one word per line--no blanks and tabs
-word starting at the beginning of the line
-word starting after some blanks.

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/*********************************************************** * You can use all the programs on www.c-program-example.com * for personal and learning purposes. For permissions to use the * programs for commercial purposes, * contact [email protected] * To find more C programs, do visit www.c-program-example.com * and browse! * * Happy Coding ***********************************************************/ #include<stdio.h> #include<string.h> main() { int strln,wordln,i,j,k,flag,count=0; char str[200],word[20]; printf("Enter line of text:n"); gets(str); printf("Enter the word to count:n"); scanf("%s",word); strln=strlen(str); wordln=strlen(word); for(i=0;i<strln;i++) { if(str[i]==word[0]&&((str[i-1]==' '||i==0)&&(str[i+wordln]==' '||str[i+wordln]==''))) { for(flag=0,k=i+1,j=1;j<wordln;j++,k++) { if(str[k]==word[j]) { flag++; } } if(flag==wordln-1) { count++; } } } printf("Number of occurence of '%s' = %dn",word,count); }

C Program Examples

word count

K&R C Program Exercise 1-11

C Program to count the number of occurrences of particular word in a string