Answer / raghuram

/*in 2n comparisons*/


#include<iostream.h>
#include<string.h>
#include<stdio.h>

int count=0;
void rev_word(char str[20],int m,int n)
{
int i,l,k;
k=n-m+1;
if(k%2==0)
l=(k/2-1);
else
l=k/2;
k=n;
for(i=m;i<=m+l;i++)
{
char t=str[i];
str[i]=str[k];
str[k]=t;
k--;
}
}
int main()
{
char str[100];
int i,j=0;
cout<<"\n\nenter string:";
gets(str);

rev_word(str,0,strlen(str)-1);


for(i=0;i<=strlen(str);i++)
{
if(str[i]==' '||str[i]=='\0')
{
rev_word(str,j,i-1);
j=i;
while(str[j]==' ')
j++;
i=j;
}
}
cout<<"\n\nsentence with order of words reversed is:";
cout<<str;
return 0;
}

Answer / prabhakar

//Simple String Reverse
#include<stdio.h>
#include<string.h>
char str1[50],str2[50];
main()
{
printf("\nEnter The String:");
gets(str1);
rev(str1);
}
rev(char s[20])
{
int i=0,a=0,j=0,k=0;
a=strlen(s);
b:
a--;
while(s[a]!=' '&a>=0)
{
str2[i]=s[a];
a--,i++;
}
str2[i]='\0';
j=strlen(str2)-1;
while(str2[k]!='\0')
{
printf("%c",str2[j]);
j--,k++;
}
printf(" ");
if(a>=0)
{
goto b;
}
printf("\n\n");
}

Finding a number which was log of base 2

1 Answers   NetApp,

---

How can i find first 5 natural Numbers without using any loop in c language????????

2 Answers   Microsoft,

---

main() { unsigned int i=10; while(i-->=0) printf("%u ",i); }

2 Answers   HP,

---

Write a C program to add two numbers before the main function is called.

11 Answers   Infotech, TC,

---

main() { int i=5,j=6,z; printf("%d",i+++j); }

2 Answers  

---

Write a C program that defines a 2-dimentional integer array called A [50][50]. Then the elements of this array should randomly be initialized either to 1 or 0. The program should then print out all the elements in the diagonal (i.e. a[0][0], a[1][1],a[2][2], a[3][3], ……..a[49][49]). Finally, print out how many zeros and ones in the diagonal.

2 Answers  

---

Give a very good method to count the number of ones in a 32 bit number. (caution: looping through testing each bit is not a solution)

7 Answers   Microsoft,

---

Is there any difference between the two declarations, 1. int foo(int *arr[]) and 2. int foo(int *arr[2])

1 Answers  

---

Is the following statement a declaration/definition. Find what does it mean? int (*x)[10];

1 Answers  

---

Is the following code legal? struct a { int x; struct a b; }

1 Answers  

---

Given n nodes. Find the number of different structural binary trees that can be formed using the nodes.

16 Answers   Aricent, Cisco, Directi, Qualcomm,

---

How to reverse a String without using C functions ?

33 Answers   Matrix, TCS, Wipro,

---