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C Programming :: Variable Number of Arguments

Variable Number of Arguments - Point Out Errors
Variable Number of Arguments - Yes / No Questions
Variable Number of Arguments - Find Output of Program
Variable Number of Arguments - True / False Questions

  1. Point out the error in the program.

    #include 
#define MAX 128 
 int main() 
 {   
     char mybuf[] = "Fresher";  
     char yourbuf[] = "GATE";    
     char *const ptr = mybuf;     
     *ptr = 'a';  
     ptr = yourbuf;  
    return 0; 
}

    2. A.

    Error: unknown pointer conversion
    B.

    Error: cannot convert ptr const value
    C.

    No error
    D.

    None of above

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  2. What will be the output of the program?

    

  #include
  #include
  void fun(char *msg, ...); 

  int main() 
  { 
    fun("FresherGATE", 1, 4, 7, 11, 0);     
    return 0; 
 }
 void fun(char *msg, ...)
 {     
     va_list ptr;   
     int num;   
     va_start(ptr, msg);    
     num = va_arg(ptr, int);    
     num = va_arg(ptr, int);     
     printf("%d", num); 
}

     

    3. A.

    FresherGATE 1 7 11 0
    B.

    1
    C.

    4
    D.

    7

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  3. What will be the output of the program?

     #include
 #include 
 void fun1(char, int, int *, float *, char *); 
 void fun2(char ch, ...);
 void (*p1)(char, int, int *, float *, char *); 
 void (*p2)(char ch, ...); 
 
 int main() 
 {   
     char ch='A'; int i=10;   
     float f=3.14; char *p="Hello";     
     p1=fun1;  
     p2=fun2;   
     (*p1)(ch, i, &i, &f, p);  
     (*p2)(ch, i, &i, &f, p);     
     return 0;
 } 
 void fun1(char ch, int i, int *pi, float *pf, char *p)
 {    
    printf("%c %d %d %f %s \n", ch, i, *pi, *pf, p); 
 }
 void fun2(char ch, ...) 
 {    
     int i, *pi; float *pf; char *p;     
     va_list list;  
     printf("%c ", ch);     
     va_start(list, ch); 
     i = va_arg(list, int);     
     printf("%d ", i);    
     
      pi = va_arg(list, int*);     
      printf("%d ", *pi);  
      pf = va_arg(list, float*);     
      printf("%f ", *pf); 
      p = va_arg(list, char *);     
      printf("%s", p);
 }

    4. A.

    A 10 3.14
    A 10 3.14
    B.

    A 10 10 3.140000 Hello
    A 10 10 3.140000 Hello
    C.

    A 10 Hello
    A 10 Hello
    D.

    Error

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  4. What will be the output of the program?

    

  #include
  #include
  void dumplist(int, ...); 

  int main()
  {    
      dumplist(2, 4, 8);     
      dumplist(3, 6, 9, 7);  
      return 0;
 }
 void dumplist(int n, ...)
 {     
     va_list p; int i;
     va_start(p, n);   

     while(n-->0)   
     {       
         i = va_arg(p, int);         
         printf("%d", i);  
    }    
     va_end(p); 
     printf("\n"); 
 }

    5. A.

    2 4
    3 6
    B.

    2 4 8
    3, 6, 9, 7
    C.

    4 8
    6 9 7
    D.

    1 1 1
    1 1 1 1

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  5. What will be the output of the program?

     #include
 #include 
  void display(int num, ...);

  int main() 
  {  
      display(4, 'A', 'B', 'C', 'D');     
      return 0;
  } 
  void display(int num, ...) 
  {    
      char c, c1; int j;    
      va_list ptr, ptr1;     
      vastart(ptr, num);     
      va_start(ptr1, num);     
      for(j=1; jint);         
          printf("%c", c);  
          c1 = va_arg(ptr1, int);         
          printf("%d\n", c1);  
     }
 }

    6. A.

    A, A
    B, B
    C, C
    D, D
    B.

    A, a
    B, b
    C, c
    D, d
    C.

    A, 65
    B, 66
    C, 67
    D, 68
    D.

    A, 0
    B, 0
    C, 0
    C, 0

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  6. What will be the output of the program?

    
 #include
 #include
  void fun1(int num, ...); 
  void fun2(int num, ...);  

  int main() 
  {    
      fun1(1, "Apple", "Boys", "Cats", "Dogs");  
      fun2(2, 12, 13, 14);    
      return 0;
  }
  void fun1(int num, ...)
  { 
      char *str;   
      va_list ptr;    
      va_start(ptr, num);   
      str = va_arg(ptr, char *);     
      printf("%s ", str); 
  }
  void fun2(int num, ...)
  {    
     va_list ptr;   
     va_start(ptr, num);  
     num = va_arg(ptr, int);     
     printf("%d", num); 
 }

    7. A.

    Dogs 12
    B.

    Cats 14
    C.

    Boys 13
    D.

    Apple 12

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