How to reverse a string using a recursive function, without swapping

/* Following code does as intended */ #include #define REVERSE_STRING(X) Rstring(X, *(X), strlen(X)-1) void Rstring( char *str, char c, int index ) { if( index != 0 ) Rstring( str, *(str+(strlen(str))-index), index-1);

write a program to swap Two numbers without using temp variable.

void swap(int *a,int *b) { if(*a == *b) return; *a^=*b; *b^=*a; *a^=*b; }

give one ip, find out which contry

You can use simple ASP script to lookup country code/name from any ip addresses

write a program to find out number of on bits in a number?

int setbit=1; //Lets start checking from first bit int numBitSet=0; //Number of bits set in the number while(setbit>0) { if(number&setbit) //bit wise and numBitSet++; setbit=setbit<<1; }

What are Storage Classes in C ?

There are four type of storage classes in C. These are used to store variables. These are Extern, Static, Register and Auto. Auto is the default class assigned to any variable. eg. if we define int x=10; then it means auto int x=10 regis

write the program for prime numbers?

main() { int i,j=2,ch=0; clrscr(); printf("\nENTER ANY NUMBER"); scanf("%d",&i); while(j<=i/2) { if(i%j==0) { printf("%d IS NOT PRIME",i);

what is the advantage of function pointer

code complexcity is less

what is the hexidecimal number of 4100?

FA0

What are advantages and disadvantages of recursive calling ?

advantage:using recursion we can avoid unnecessary calling of functions. disadvantage:by too many recursive functions there may be confusion in the code.

how the size of an integer is decided? - is it based on processor or

compiler

Write a program to compare two strings without using the strcmp() fu

#include int str_cmp(const char *s1, const char *s2) { unsigned int i = 0, diff; while(*(s1+i) && *(s2+i)) { diff = (*(s1+i)-*(s2+i)); if(!diff)i++;

class foo { public: static int func(const char*& p) const; };

the 2nd const used in the example is invalid because it can be used only with member functions which have a hidden argument called this. The 2nd const would be applied to this. The funct is static member function so it hasn't any this p

Give a fast way to multiply a number by 7

(x<<2)-1

what is difference between array and structure?

array -same data type structure -diff datatype

how to estimate the disk access time? e.g. the time between read one

Disks are block devices. Mean one block of data can be read at one point of time. So there is no point of time between read one byte and another byte. If intended to calculate time to read one byte, first of all we need to calculate the time

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