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- Question
C program to find whether a number is palindrome or not.
- Correct Answer
- #include
int main(){ int num,r,sum=0,temp; printf("Enter a number: "); scanf("%d",&num); temp=num; while(num){ r=num%10; num=num/10; sum=sum*10+r; } if(temp==sum) printf("%d is a palindrome",temp); else printf("%d is not a palindrome",temp); return 0; } Sample output: Enter a number: 131 131 is a palindrome
- 1. What will output when you compile and run the following code? #include
struct student { int roll; int cgpa; int sgpa[8]; }; void main() { struct student s = { 12,8,7,2,5,9 }; int *ptr; ptr = (int *)&s; clrscr(); printf( "%d", *(ptr+3) ); getch(); }
Options- A. 8
- B. 7
- C. 2
- D. Compiler error Discuss
- 2. What will be output of following program ? #include int main() { int a = 10; void *p = &a; int *ptr = p; printf("%u",*ptr); return 0; }
Options- A. 10
- B. Address
- C. 2
- D. Compilation error Discuss
- 3. How would you use the function memmove()? Discuss
- 4. What would be the output of the following program? main() { char huge * near * far *ptr1; char near * far * huge *ptr2; char far * huge * near *ptr3; printf ("%d%d%d", sizeof (ptr1), sizeof (ptr2), sizeof (ptr3)); } Discuss
- 5. Point out the error, if any, in the following program. #include "stdarg.h" main() { display ( 4, 12.5, 13.5, 14.5, 44.3); } display(int num, ...) { float c; int j; va_list ptr; va_start (ptr, num); for ( j = 1; j <= num; j++) { c = va_arg ( ptr, float ); printf ("\n%f", c); } } Discuss
- 6. Write a c program to find out sum of diagonal element of a matrix. Discuss
- 7. The output of the code below is #include
void main() { int i = 0, k; if ( i == 0 ) goto label; for ( k = 0;k < 3; k++ ) { printf( "hin" ); label: k = printf( "%03d", i ); } }
Options- A. 0
- B. hi hi hi 0 0 0
- C. 0 hi hi hi 0 0 0
- D. 0 0 0 Discuss
- 8. Can you suggest any other way of writing the following expression such that 30 is used only once? a <= 20 ? b = 30 : c = 30 ; Discuss
- 9. What would be the output of the following program? main() { int i = -3, j =2, k =0, m ; m = ++j && ++i || ++k ; Printf ( "\n%d%d%d%d", i , j , k , m ); } Discuss
- 10. We want to round off x, a Float to an Int value. The correct way to do so would be
Options- A. Y = ( int ) ( x + 0.5 ) ;
- B. Y = int ( x + 0.5) ;
- C. Y = ( int ) x + 0.5;
- D. Y = ( int ) ( ( int ) x + 0.5 ) Discuss
Programming problems
Search Results
Correct Answer: 2
Correct Answer: 10
Explanation:
Void pointer can hold address of any data type without type casting. Any pointer can hold void pointer without type casting.
Correct Answer: #include "memh" #include "alloch" main() { int area; char *dest; char src[] = "Life is the camera and you are the target" "so keep smiling always"; area = sizeof (src); dest = malloc (area); memmove (dest, src, area); printf("\n%s", dest); printf("\n%s",src); }
Correct Answer: 4 4 2
Correct Answer: While extracting a float argument using va_arg we should have useed c = va_arg (ptr, double)
Correct Answer: #include
Correct Answer: 0
Correct Answer: *( ( a <= 20 ) ? &b : &c ) = 30;
Correct Answer: -2 3 0 1
Correct Answer: Y = ( int ) ( x + 0.5 ) ;
Explanation:
Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.
y = (int)(x + 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)
Example:
#include
int main ()
{
float x = 2.6;
int y = (int)(x + 0.5);
printf ("Result = %d\n", y );
return 0;
}
Result : 3
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