C Programming :: Input / Output

1. fputs function is used to

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Answer: Requires a file pointer

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2. The function fprintf is used in a program

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Answer: when the output is to be printed on to a file

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3. What is the following C Program doing?

void main ()
{
char line [80];
gets (line);
puts (line);
}

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Answer: reads and prints lines composed of characters

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4. if i,j,k are integers, the scanf function to enter i,j,k such that i is decimal,j is octal and k is hexadecimal would be

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Answer: scanf("%d %o %x",&i, &j, &k)

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5. What would be the output of the following C program if input to the program is 'e'?

void main ()
{
char lower, upper;
lower = getchar();
upper= toupper (lower);
putchar (upper);
}

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Answer: E

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