C find word in file
Read more about pointer arithmetic in C programming to know how (pos - str) evaluates to index of word in str. While ((pos = strstr(str + index, word)) != NULL) While ((fgets(str, BUFFER_SIZE, fptr)) != NULL) Int countOccurrences(FILE *fptr, const char *word) * Returns total occurrences of a word in given file. Printf("'%s' is found %d times in file.", word, wCount) Call function to count all occurrence of word Printf("Please check you have read/write previleges.\n") * Exit if file not opened successfully */ Printf("Enter word to search in file: ") * C program to count occurrences of a word in file. Program to count occurrences of a word in file /** I have written entire logic to count occurrences of word inside a countOccurrences() function.
To make things simple and more maintainable, I have used functions.
C++ FIND WORD IN FILE HOW TO
Logic to count all occurrence of a word in file in C program.īasic Input Output, String, Functions, Pointers, File Handling How to count occurrences of a word in file in C programming. Now we know that we have to add two functions: Usage() and Search_in_File().Write a C program to count occurrences of a word in file. If everything went alright the program will return 0. The results are captured to do some basic error-handling in the if statement that follows. The actual work is done in the next statement where we call a second function called Search_in_File that uses our command-line input. The system() function can execute a system specific command.
C++ FIND WORD IN FILE WINDOWS
With the system(“cls”) function on windows and system(“clear”) function on Unix/Linux we can clear our screen, so we can display the results on a fresh screen. To read more on command-line parsing read the following tutorials: C Tutorial – More on Functions and C Tutorial – Command Line Parameter Parsing. (Note: that the first command-line parameter is the program itself.) We just say if the command-line parameters are smaller or larger than three, display our usage function and exit the program.
We also want to make sure that we get a proper usage message, if the command-line options are not inputted correctly. This why we use int main(int argc, char *argv). Result = Search_in_File(argv, argv) īecause we want to write a program that can that can be used over and over, we need to make sure that all the variables we need, such as filename and the search-string, can be inputted at the command-line.