Question - 1
int main()
{
int x[10]={0,1,2,3,4,5,6,7,8,9};
int *ptr1,*ptr2;
ptr1=&x[0];
ptr2=&x[5];
printf("%p\n",(ptr1+ptr2));
return 0;
}
Question - 2
int main()
{
int color=2;
switch(color)
{
case 0: printf("Black");
case 1: printf("Blue");
case 2: printf("Green");
case 3: printf("Aqua");
default: printf("Other");
}
return 0;
}
Question - 3
int main()
{
char str[10]="Hello";
printf("%d,%d\n",strlen(str),sizeof(str));
return 0;
}
Question - 4
int main()
{
char *str="Hello";
printf("%d,%d\n",strlen(str),sizeof(str));
return 0;
}
Question - 5
void test(struct number n)
{
n.x=100;
}
struct number{ int x; };
int main()
{
struct number num;
test(num);
printf("%d\n",num.x);
return 0;
}
Question - 6
int main()
{
if(0);
printf("Hello");
printf("Hi");
return 0;
}
Question - 7
int main()
{
int x,y;
int *ptr;
x=100;
ptr=&x;
y=*ptr;
printf("%d\n",y);
return 0;
}
Question - 8
int main()
{
int val=1;
do{
val++;
++val;
}while(val++>25);
printf("%d\n",val);
return 0;
}
Question - 9
int main()
{
char *str="A%%B";
printf("A%%B ");
printf("%s\n",str);
return 0;
}
Question - 10
int main()
{
printf("%d,%d,%d\n",sizeof(char*),
sizeof(int*),sizeof(float*));;
return 0;
}
C programming
Answer Question 1:
Output
Explanation
Error in the statement printf("%p\n",(ptr1+ptr2));
Addition of two pointers is not allowed.
Answer Question 2:
Output
Explanation
There are no break statements, so all the statements after case 2 will be executed including default statement.
Answer Question 3:
Output
Explanation
strlen gives length of the string that is 5; sizeof gives total number of occupied memory for a variable that is 8; since str is a pointer so sizeof(str) may be 2,4 or 8. It depends on the computer architecture.
Answer Question 4:
Output
Explanation
strlen gives length of the string that is 5; sizeof gives total number of occupied memory for a variable that is 10; Since str is a variable with maximum number of characters 10, so sizeof will be 10.
Answer Question 5:
Output
error: parameter 1 ('n') has incomplete typeExplanation
Structure number should be defined before test function definition.
Answer Question 6:
Output
Explanation
There is a semicolon after the if statement, so this statement will be considered as separate statement; and here printf("Hello"); will not be associated with the if statement. Both printf statements will be executed.
Answer Question 7:
Output
Explanation
Here, y is assigned the value stored at the pointee variable, which is pointer through ptr.
Answer Question 8:
Output
Explanation
Here, do while loop executes once and then it will check condition while will be false meanwhile value will be increased 3 times (two times in do while body and once while checking the condition); hence value will be 4.
Answer Question 9:
Output
Explanation
printf("A%%B"); will print "A%B" because "%%" will always print "%" while str contains "A%%B" will print "A%%B" - in this statement "%%" will not replace with single "%"
Answer Question 10:
Output
Explanation
No matter which kind of pointers are. Pointer variables take same bytes in the memory. The value may be 2, 4 or 8 depending on the computer architecture.
In our case we are using 64 bits computer architecture, so output is 8, 8, 8.
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