Text to print on the console if the file is not found. Use an if statement to check whether the file does not exist. The file will be opened in the in mode for reading from it. Use the open () function to create a new file named myfile.txt. Add a for loop till strstr(string, student) does-not returns null. Create an instance of the fstream class and give it the name myfile.

If the file does not exist, fopen ( ) returns NULL. If the file cannot be opened fopen ( ) returns NULL.

If the file is opened successfully fopen ( ) loads it into memory and sets up a pointer which points to the first character in it. In Agent Ransack, choose the folder you want to search through, enter the search term and click Start, that utility will even preview the file where that terms. While ( fscanf(in_file,'%s', string) = 1) File opening modes in C: r Searches file. When installing that, choose the Free version, then at the end of the installer, choose the Lite (free) version, that will very quickly find files with the exact content you search for. Printf('please enter a word(enter 0 to end) ') But in actual there is only one word 'to'.įILE *in_file = fopen('student.txt', 'r') That makes your code 100% better to study.Added a sample code in its simplest form. Whenever you post code, click on the # icon in the advanced editing window, and paste your program between the code tags it will give you. Talking specifics is always better than talking about generalities with C.

Post up a 4 or 5 line example file for the original, and also, an example of the output file you want to have. There are other ways, but this is as clear a way to do it, as any, and has the smallest chance of messing up the original file contents, imo. Usually, a good way is to follow logic like this:Ģ) While it has data, read the contents into a bufferģ) If the buffer has the data you want to replace, then replace it, right inside the buffer.Ĥ) write the buffer contents out to the new fileĥ) when the file being read, is empty, delete itĦ) and name the new file, with the old file name There are many ways to replace a string, or part of a string in a file.

How to find word in file c++