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Discussion :: Input / Output

  1. Point out the error/warning in the program?

     #include

  int main()
  {
     unsigned char ch;   
     FILE *fp;  
     fp=fopen("trial", "r");     
     while((ch = getc(fp))!=EOF)         
         printf("%c", ch);     
     fclose(fp); 
     return 0; 
 }

    2. A.

    Error: in unsigned char declaration
    B.

    Error: while statement
    C.

    No error
    D.

    It prints all characters in file "trial"

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    Workspace

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    Answer : Option A

    Explanation :

    Here, EOF is -1. As 'ch' is declared as unsigned char it cannot deal with any negative value.

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