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What is return type of getchar(), fgetc() and getc() ?

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In C, return type of getchar(), fgetc() and getc() is int (not char). So it is recommended to assign the returned values of these functions to an integer type variable.
char ch;  /* May cause problems */  
while ((ch = getchar()) != EOF) 
{
   putchar(ch);
}

                    
Here is a version that uses integer to compare the value of getchar().
int in;  
while ((in = getchar()) != EOF) 
{
   putchar(in);
}

                    
See this for more details.

Last Updated : 28 May, 2017
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