filing in c language [duplicate]

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Replacing a word in a file, using C

i am doing filing in c language. i have created a txt file and write some data into it. but as my program progress i have to search some text and replace it with the other word but the problem i am facing is that suppose in my file i wrote

"i bought apple from the market"

if i replace apple with pineapples , as apple has 5 char and pineapple has 9 char it will write it as

"i bought pineapple m the market"

t开发者_JS百科hat it also has affect the words written after apple because of the different char length

i have use fseekpos function to find the pointer position

thanks

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• take all data with io function
• store it in double pointer ( use two dimension )
• after seeing EOF, clear the used file, close it
• write some function to do your task and manipulate the data stored in two dimension
• open it again, but now to write the manipulated data in it