Faq On Array Addition and subtraction

what could be the output of the following program.

int main()

{

char a[] = "www.neentech.blogspot.com";

char *p = a;

printf("%s", p + p[5] - p[13]);

getch();

return 0;

}

Ans: It will display the below output

.neentech.blogspot.com

Array addition and subtraction

Explanation:  From the Statement p + p[5] – p[13], p points to address of array a . And p[5] contains/holds character ‘e’ and p[13] holds character ‘b’. So the final statement will be p + ’e’ – ‘b’ ==> p + 101 – 98 (here 'e' equals to decimal 101 & 'b' equals to Decimal 98) ==> p+3 ==> will give the address location of a[3]. So it will start printing the string from a[3].

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What getchar function returns and list out similar functions?

what is the Output of the following Program?

#include “stdio.h”
void main(void)

{

printf("\t %d ",getche());

getch();

}

ANSWER:  it will return the Equivalent ASCII decimal value of entered character..



getchar() Function

 

getch(), getche(), getchar() will return integer value.

getchar() returns the Equivalent decimal(ASCII) value of entered character with echoing the entered character.

getche() returns the Equivalent decimal(ASCII) value of entered character with echoing the entered character.

getch() returns the Equivalent decimal(ASCII) value of entered character without echoing the entered character.

Note: Here getchar() is ASCII C Standard Function. getche() and getch() functions are non-standard functions. so this program may not be compiled successfully in many Platforms.. This can be compiled

successfully in VC++ and Turbo C/C++ compilers...

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