What is the purpose of "rb" in fopen() function used below in the code? FILE *fp; fp = fopen("source.txt", "rb"); ans.
Question
What is the purpose of "rb" in fopen() function used below in the code?
FILE *fp;
fopen("source.txt", "rb");
Solution
The "rb" in the fopen() function stands for "read binary". This mode opens the file in binary mode for reading.
Here's a step-by-step breakdown:
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FILE *fp; - This line is declaring a pointer to a FILE. This is necessary because the fopen() function returns a pointer to the file you want to open.
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fp = fopen("source.txt", "rb"); - This line is calling the fopen() function. The fopen() function is used to open a file and it returns a FILE pointer.
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"source.txt" - This is the name of the file you want to open. It could be any valid file name.
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"rb" - This is the mode in which you want to open the file. The "r" stands for "read", meaning you want to open the file for reading. The "b" stands for "binary", meaning you want to open the file in binary mode.
So, in summary, this code is opening the file named "source.txt" in binary mode for reading, and storing the FILE pointer in the variable fp.
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