"union" Data Type

Q

What's the output of the following program? And why?

#include 
main() {
  typedef union {
    int a;
    char b[10];
    float c;
  }
  Union;
  
  Union x,y = {100};
  x.a = 50;
  strcpy(x.b,"hello");
  x.c = 21.50;
  printf("Union x : %d %s %f n",x.a,x.b,x.c);
  printf("Union y : %d %s %f n",y.a,y.b,y.c);
}

✍: Guest

A

(This question has not been answered yet. If you know the answer, please share it in a comment below.)

2007-02-26, 8494👍, 0💬

printf() Function
What is the output of printf("%d")? 1. When we write printf("%d",x); this means compiler will print the value of x. But as here, there is nothing after "%d", so compiler will show in output window gurbage value. 2. When we use %d the compiler internally uses it to access the argument in the stack (a... 2007-02-26, 8958👍, 0💬

calloc() and malloc() Functions
What is the difference between "calloc(...)" and "malloc(...)"? 1. calloc(...) allocates a block of memory for an array of elements of a certain size. By default the block is initialized to 0. The total number of memory allocated will be (number_of_elements * size). malloc(...) takes in only a singl... 2007-02-26, 8876👍, 0💬

Deteting Circular Linked List
Can you tell me how to check whether a linked list is circular? Create two pointers, and set both to the start of the list. Update each as follows: while (pointer1) { pointer1 = pointer1->next; pointer2 = pointer2->next; if (pointer2) pointer2=pointer2->next ;if (pointer1 == poi... 2007-02-26, 8599👍, 0💬

Reducing the Final Size of an Executable File
How to reduce the final size of an executable file? Size of the final execuatable can be reduced using dynamic linking for libraries. 2007-02-26, 8526👍, 0💬

"union" Data Type
What's the output of the following program? And why? #include main() { typedef union { int a; char b[10]; float c; } Union; Union x,y = {100}; x.a = 50; strcpy(x.b,"hello"); x.c = 21.50; printf("Union x : %d %s %f n",x.a,x.b,x.c); printf("Union y : %d %s %f n",y.a,y.b,y.c); } 2007-02-26, 8495👍, 0💬

Printing Permutaions of a String
Write out a function that prints out all the permutations of a string. For example, abc would give you abc, acb, bac, bca, cab, cba. void PrintPermu (char *sBegin, char* sRest) { int iLoop; char cTmp; char cFLetter[1]; char *sNewBegin; char *sCur; int iLen; static int iCount; iLen = strlen(sRest); i... 2007-02-26, 8150👍, 0💬

Shift Operators
What will be printed as the result of the operation below: main() { int x=5; printf("%d,%d,%d\n",x,x&lt ;<2,x>>2) ;} As x = 5 = 0x0000,0101; so x << 2 -< 0x0001,0100 = 20; x >> 2 -> 0x0000,0001 = 1. Therefore, the answer is 5, 20, 1. 2007-02-26, 7811👍, 0💬

Using Pointers
What print out will the folloging code produce? main() { char *p1=“name”; char *p2; p2=(char*)malloc(20); memset (p2, 0, 20); while(*p2++ = *p1++); printf(“%s\n”,p2);> } The pointer p2 value is also increasing with p1 . *p2++ = *p1++ means copy value of *p1 to *p2 , then increment both addresses (p... 2007-02-26, 7545👍, 0💬

Incremental Operatos
What will be printed as the result of the operation below: main() { int x=20,y=35; x=y++ + x++; y= ++y + ++x; printf("%d%d\n",x,y); } Answer : 5794 2007-02-26, 7318👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.