Anti-Coding 2015 Problems - Round 1

anti-coding-15.md

1

What will be the output?

#include <stdio.h>
int main(){
    int c=5;
    printf("%d",main||c);
    return 0;
}

1. Runtime Error
2. 5
3. 1
4. 0
5. Compilation Error

2

#include<stdio.h>
int main(){
    const int *p=5;
    int a=10;
    p=&a;
    printf("%d",*p);
    return 0;
}

1. 0
2. 10
3. Garbage value
4. Any memory address
5. Error: cannot modify constant object

3

#include <stdio.h>
int main(){
    signed x;
    unsigned y;
    x=10+-10u+10u+-10;
    y=x*x;
    if(y==x){
        printf("%d %d",x,y);
    }else{
        printf("%u %u",x,y);
    }
    return 0;
}

1. -10 100
2. 0 0
3. 10 100
4. Compilation Error

4

#include<stdio.h>
int main(){
int goto=5;
printf("%d",goto);
return 0;
}

1. 5
2. Runtime Error
3. Compilation error
4. None of these

5

#include <stdio.h>
int main(){
    char arr[10];
arr="world";
printf("%s",arr);
return 0;
}

1. world
2. w
3. NULL
4. Compilation Error
5. None of the Above. (Specify)

6

Insert appropriate condition to print "Helloworld"

#include <stdio.h>
int main(){
    if(____){
        printf("Hello");
    }else{
        printf("world");
    }
    return 0;
}

7

#include <stdio.h>
main(){
    float a=1.1;
    double b=1.1;
    if(a<1.1){
        printf("1y");
    }else{
        printf("1n");
    }
    if(b<1.1){
        printf("2y");
    }else{
        printf("2n");
    }
    if(a==b){
        printf("3y");
    }else{
        printf("3n");
    }
    return 0;
}

8

#include <stdio.h>
int main(){
    static int a=5;
    printf("%d ",a--);
    if(a){
main();
    }
}

9

#include <stdio.h>
int main(){
    extern int a;
    a=20;
    printf("%d",a);
    return 0;
}

1. 20
2. Stack Overflow error
3. Memory Linking error (undefined reference)

10

int main(){
    int i=10;
static int x=I;
    if(x==i){
    printf("Equal");
    }else if(x>i){
        Printf("Greater than");
    }else{
        Printf("less than");
    }
}

1. Equal
2. Greater than
3. Less than
4. Compilation Error
5. Runtime Error

11

#include <stdio.h>
int main(){
int v=1024;
    v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v++;
v >>= 1;
printf("%d",v);
}

What is the output? What if instead of fixed value of ‘v’, I decide to take a user input value?

12

#include<stdio.h>
int main(){
    int c=- -2;
    printf("%d",c);
    return 0;
}

13

#define square(x) x*x
#include <stdio.h>
int main(){
    int a;
    a=64/square(4);
    printf("%d",a);
    return 0;
}

14

#include <stdio.h>
int main(){
    int i=0;
    for(;i++;printf("%d",i--));
    printf("%d",i);
    return 0;
}

1. 0
2. 1
3. 11111111111...
4. 00000000000...

15

#include <stdio.h>
int main(){
int i=-1;
for(;i++;printf("%d",++i),i--);
printf("%d",--i);
return 0;
}

1. 00
2. 10
3. 11111111111...
4. 00000000000...
5. 11

16

#include <stdio.h>
int main(){
int a=(1<<4);
    int b=(1<<10);
    a^=b^=a^=(b^=a);
    a-=b;
printf("%d",(a/b)>>4);
}

1. 0
2. 4
3. 16
4. 64
5. 256
6. 1024

17

#include <stdio.h>
int main(){
int a=1684;
    int b=1684351;
    a^=b^=a^=b;
printf("%d %d",a,b);
}

1. 0 0
2. 1684 1684
3. 1684351 1684351
4. 1684351 1684
5. 1684 1684351

18

#include <stdio.h>
int main()
{
        int a=25;
        printf("%d\n",printf("%d",printf("%d",a)));
        return 0;
}

1. 252525
2. 2521
3. 2511
4. 25
5. Runtime Error

19

#include<stdio.h>
int main(){
    int n=5;
switch(n){
    int r=6;
    case 5: printf("%d",r);
        break;
    default: printf("%d",r);
        break;
}
return 0;
}

1. Compilation error
2. 6
3. 5
4. Garbage Value

20

#include <stdio.h>
#define NUMBER_OF_ELEMENTS (sizeof(array)/sizeof(array[0]))
int array[]={7,6,5,4,3,2,1};
int main(){
    printf("Hello AntiCoder!\n");
    int num;
    for(num=-1; num<=(NUMBER_OF_ELEMENTS+2); num++){
        printf("%d\n",array[num+1]);
}
    printf("Hello AntiCoder!\n");
    return 0;
}

1. Hello AntiCoder!
   Hello AntiCoder!
2. Hello AntiCoder!
   7
   6
   5
   4
   3
   2
   1
   0
   0
   0
   0
   Hello AntiCoder!
3. Hello AntiCoder!
   7
   6
   5
   4
   3
   2
   1
4. Runtime Error
5. Compile Time Error