C Programming

Practice Control Instructions –

What will be the output of the program on GCC compiler?

#include<stdio.h> 

int main() {     

  int i=0;     

  for(; i<=5; i++);         

    printf("%d", i);    

  return 0; 

} 

Practice Control Instructions –

Point out the error, if any in the while loop(on GCC compiler).

#include<stdio.h> 

int main() {     

  void fun();     

  int i = 1;    

  while(i <= 5) {        

    printf("%d
", i);         

    if(i>2)             

      goto here;    

  } 

  return 0;

} 

void fun() {   

  here:   

  printf("It works");

} 

Practice Control Instructions –

Point out the error, if any in the following program ( on GCC compiler).

#include<stdio.h>  

int main()  {      

  int i = 1;      

  switch(i) {          

    case 1:             

    printf("Case1");             

    break;          

    case 1*2+4:    

    printf("Case2");   

    break;  

  } 

  return 0; 

} 

Practice Control Instructions –

Point out the error, if any in the following program.

#include<stdio.h>  

int main()  {     

  int P = 10;      

  switch(P) {        

    case 10:         

    printf("Case 1");           

    case 20:        

    printf("Case 2");        

    break;          

    case P:         

    printf("Case 2"); 

    break;    

  }    

  return 0;

}  

Practice Control Instructions –

Which of the following errors would be reported by the program given below on GCC compiler?

#include<stdio.h>  

int main()  {      

  int a = 5;      

  switch(a) {    

    case 1:   

    printf("First");      

    case 2:   

    printf("Second");    

    case 3 + 2:   

    printf("Third");      

    case 5:   

    printf("Final");    

    break;        

  }      

  return 0;  

}  

Practice Control Instructions –

What will be the output of the following program on GCC compiler?

#include<stdio.h>  

int main()  {      

  short int i = 0;      

  for(i<=5 && i>=-1; ++i; i>0){         

    printf("%u,", i); 

  }     

  return 0;  

}  

Practice Control Instructions –

What will be the output of the following program on GCC compiler?

#include<stdio.h> 

int main() {     

  int x = 3;     

  float y = 3.0;    

  if(x == y){        

    printf("x and y are equal"); 

  }   

  else {        

    printf("x and y are not equal"); 

  }    

  return 0; 

} 

Practice Control Instructions –

What will be the output of the program on GCC compiler?

#include<stdio.h> 

int main() {     

  int a = 500, b = 100, c;     

  if(!a >= 400) 

    b = 300;   

  c = 200;  

  printf("b = %d c = %d
", b, c); 

  return 0; 

}