Answer Posted / eswar.rajan89

#include<stdio.h>

void printbits(unsigned int a)
{
int i;
int b;
for(i=31;i>=0;i--)
{
b=(a>>i) & 1;
if(b == 1)
printf("1");
else
printf("0");
}
}
int find_bit(int end_bit,int start_bit, int value)
{
int x1,i;
int x2=0,x3=0,x4=0;
for(i=start_bit;i<end_bit;i++)
{
x1=(value>>i)&1;
x2=(x2<<1) | x1;
}
for(i=0;i<end_bit;i++)
{
x3=(x2>>i)&1;
x4=(x4<<1) | x3;
}
return x4;
}

int main()
{
int a,b,c,d,val,rep_bit,main_bit,conv_bit,c1_bit;
printf("\nEnter a number 'A' and 'B' \n");
scanf("%d %d",&a,&b);
printf("\nEnter a number 'C' and 'D' \n");
scanf("%d %d",&c,&d);
val=b-a+1;
rep_bit = find_bit(val,0,d);
c1_bit = find_bit(a,0,c);
main_bit = rep_bit<<a;
printf("\nThe bits before replacement are:\n");
printbits(c);
printf("\n");
printbits(main_bit);
printf("\n");
conv_bit= main_bit | c1_bit;
printf("\nThe bit after replacement is:\n");
printbits(conv_bit);
printf("\n");
printf("\n");
return 0;
}

How many types of arrays are there in c?

1049

---

What is #include stdio h?

1123

---

Given only putchar (no sprintf, itoa, etc.) write a routine putlong that prints out an unsigned long in decimal. [ I gave the obvious solution of taking % 10 and / 10, which gives us the decimal value in reverse order. This requires an array since we need to print it out in the correct order. The interviewer wasn't too pleased and asked me to give a solution which didn't need the array ].

1097

---

What is define c?

1083

---

Why flag is used in c?

1134

---

Write a program to reverse a string.

1086

---

What does int main () mean?

1032

---

What is define directive?

1159

---

What is static memory allocation? Explain

1105

---

Is null valid for pointers to functions?

1179

---

Are pointers integer?

1020

---

How can I sort a linked list?

1049

---

Which function in C can be used to append a string to another string?

1222

---

What are the difference between a free-standing and a hosted environment?

1293

---

Is it better to use a macro or a function?

1165

---