[Solved] Issue in taking character input to C program

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You can’t use strcasecmp to compare characters. It’s not completely wrong, but a single character is not a properly terminated string.

If you must do comparison this way, use strncasecmp:

if(strncasecmp(&gender,&word_M, 1) == 0)

That will limit it to comparing one character.

Also, your retry loop doesn’t check for ‘F’, but checks ‘M’ twice.

solved Issue in taking character input to C program