Programming practices - C programming

What is the output of C Program.?

int main()

{

int a=25;

while(a <= 27)

{

printf("%d ", a);

a++;

}

return 0;

}

• 25 25 25

• 25 26 27

• 27 27 27

• Compiler error

What is the output of C Program.?

int main()

{

int a=32;

do

{

printf("%d ", a);

a++;

}

while(a <= 30);

return 0;

}

• 32

• 33

• 30

• No Output

What is the output of C Program.?

int main()

{

int k, j;

for(k=1, j=10; k <= 5; k++)

{

printf("%d ", (k+j));

}

return 0;

}

• compiler error

• 10 10 10 10 10

• 10 11 12 13 14 15

• None of the above

What is the output of C Program.?

int main()

{

int k;

for(k=1; k <= 5; k++);

{

printf("%d ", k);

}

return 0;

}

• 1 2 3 4 5

• 1 2 3 4

• 6

• 5

What will be the output of the following C code?

• 3 2 3

• 2 2 3

• 3 2 2

• 2 3 3

int main()

{

int a = 10, b = 25;

a = b++ + a++;

b = ++b + ++a;

printf("%d %d n", a, b);

}

• 36 64

• 35 62

• 36 63

• 30 28

int main ()

{

int x = 24, y = 39, z = 45;

z = x + y;

y = z - y;

x = z - y;

printf ("n%d %d %d", x, y, z);

}

• 24 39 63

• 39 24 63

• 24 39 45

• 39 24 45

What is (void*)0?

• Representation of NULL pointer
• Representation of void pointer
• Error
• None of above

#include <stdio.h>

void myfunc(int * num1, int * num2);

int main(){

int num1, num2;

printf("Enter two numbers: ");

scanf("%d%d", &num1, &num2);

printf("Before calling myfunc in main \n");

printf("Value of num1 = %d \n", num1);

printf("Value of num2 = %d \n\n", num2);

myfunc(&num1, &num2);

printf("After calling myfunc in main \n");

printf("Value of num1 = %d \n", num1);

printf("Value of num2 = %d \n\n", num2);

return 0;

}

void myfunc(int * num1, int * num2)

{

int temp;

temp = *num1;

*num1= *num2;

*num2= temp;

printf("After processing in myfunc function \n");

printf("Value of num1 = %d \n", *num1);

printf("Value of num2 = %d \n\n", *num2);

}

• Enter two numbers: 10 20

  Before calling myfunc in main

  Value of num1 = 10

  Value of num2 = 20

  
  

  After processing in myfunc function

  Value of num1 = 30

  Value of num2 = 20

  
  

  After calling myfunc in main

  Value of num1 = 30

  Value of num2 = 20

• Enter two numbers: 10 20

  Before calling myfunc in main

  Value of num1 = 10

  Value of num2 = 20

  
  

  After processing in myfunc function

  Value of num1 = 10

  Value of num2 = 20

  
  

  After calling myfunc in main

  Value of num1 = 10

  Value of num2 = 20

• Enter two numbers: 10 20

  Before calling myfunc in main

  Value of num1 = 10

  Value of num2 = 20

  
  

  After processing in myfunc function

  Value of num1 = 20

  Value of num2 = 20

  
  

  After calling myfunc in main

  Value of num1 = 10

  Value of num2 = 10

• Enter two numbers: 10 20

  Before calling myfunc in main

  Value of num1 = 10

  Value of num2 = 20

  
  

  After processing in myfunc function

  Value of num1 = 20

  Value of num2 = 10

  
  

  After calling myfunc in main

  Value of num1 = 20

  Value of num2 = 10