1. Find the output for the following programs(branching and looping)
#include<stdio.h>
Void main()
{
int i;
for( i = 1 ; i < 4 ; i++)
{
switch(i)
{
case 1 : printf("%d" , i);break;
case 2 : printf("%d" , i);break;
case 3 : printf("%d" , i);break;
}
}
switch(i)
{
case 4 : printf("%d" , i);break;
}
}
Output : 1234
2. Find the output( operartor and expression)
void main()
{
char *s = "\12345s\n";
printf("%d" , sizeof(s));
}
Output : 4
3. Find the output( Funtions)
int main()
{
static int i = 3;
printf("%d" , i--);
return i>0 ? main() : 0 ;
}
Output : 321
4. Find the output(pointers)
int main()
{
char *s[]={ "dharmr'a","hewlett-packard","siemens","ibm"};
char **p;
p = s ;
printf("%s" ,++*p);
printf("%s",*p++); ;
printf("%s" ,++*p);
}
Output: harmr’aharmr’aewlett-packard
5. Find the output( dynamic memory)
#include<stdio.h>
#include<malloc.h>
#include<string.h>
int main()
{
int i;
char a[]="String";
char *p = "New String";
char *temp;
temp = malloc(strlen(p) + 1);
p = malloc( strlen(temp) + 1);
strcpy(p , temp);
printf("%s" , p);
}
Output : unpredictable string
6. Find the output(algorithm)
int main()
{
int n = 12 , res = 1;
while( n > 3)
{
n -= 3;
res *= 3;
}
printf("%d" , n*res);
}
Output : 81
7. Find the output(function)
void fun(int [][3]);
int main()
{
int a[3][3] = {9,8,7,6,5,4,3,2,1};
fun(a);
printf("%d\n" , a[2][1]);
}
void fun(int b[][3])
{
++b;
b[1][1]=5;
}
Output : 5
8. Find the output(strings)
void main()
{
int i , n;
char x[5];
strcpy( x , "Zoho");
n = strlen(x);
*x = *(x+(n-1));
printf("%s" , x);
}
Output: ooho
9. Find the output(arrays)
void main()
{
int c[]={5,4,3,4,5};
int j , *q = c;
for( j = 0 ; j<5 ; j++){
printf("%d" , *c);
++q;
}
}
Output:55555
10. Find the output(branching and looping)
void main()
{
int i = 1;
for(i =0 ; i= -1 ; i=1){
printf("%d", i);
if(i!= 1) break;
}
}
Output: -1
11. Find the output(Arrays)
void main()
{
int s[] = {1,0,5,0,10,0};
int f[] = {2,4,6,8,10,12};
int n = 6 , i = 0 , j = 0;
for( j = 1 ; j < n ; j++)
{
if( s[j] >= f[i])
{
printf("%d" , i);
i = j;
}
}
}
output : 02
12. Find the output(Functions)
void f(int *a , int m)
{
int j = 0;
for(j = 0 ; j < m ; j++)
{
*(a+j) = *(a+j) - 5;
}
}
void main()
{
int a[] = {'f' , 'g' , 'h' , 'i' , 'j'};
int j = 0 ;
f(a , 5);
for(j = 0 ; j<= 4 ; j++)
printf("%c\t" , a[j]);
}
Output:a b c d e
13. Find the output(branching and looping)
void main()
{
int i=0, j=0 , sum=0;
for(i= 1; i < 500 ; i*=3)
for(j=0;j<i;j++)
sum++;
printf("%d",sum);
}
Output: 364
14. Find the output(branching and looping)
void main()
{
int n;
for(n = 6 ; n!= 1; n--)
printf("%d" , n--);
}
Output: infinite loop
15. Find the output(arrays)
void main()
{
int a[3][4] = {2,4,6,5,10,12,12,10,5,6,4,2};
int i = 0 , j , k =99;
while(i < 3)
{
for(j = 0 ; j < 4 ; j= j++)
{
if( a[i][j] < k)
{
k = a[i][j];
}
}
i++;
}
printf("%d" , k);
}
Output : 2
16. Find the output( pointer)
void main()
{
char *x="Alice";
int i , n = strlen(x);
*x = x[n];
for(i=0; i<=n; i++)
{
printf("%s ", x); x++;
printf("\n", x);
}
return 0;
}
Output : runtime error
17. Find the output(structures and union)
struct value{
int bit1:1;
int bit3:4;
int bit4:4;
}bit;
int main()
{
printf("%d\n", sizeof(bit));
return 0;
}
Output : 4
18. Find the output(dynamic memory)
struct node
{
int data;
float d;
struct node *link;
};
int main()
{
struct node *p, *q;
p = (struct node *) malloc(sizeof(struct node));
q = (struct node *) malloc(sizeof(struct node));
printf("%d, %d\n", sizeof(p), sizeof(q));
return 0;
}
Output : 4 , 4
19. Find the output(structures and unions)
typedef union
{
int a;
char b[10];
float c;
}Union;
int main()
{
Union x , y = {100};
x.a = 50;
strcpy(x.b , "Hello");
x.c = 21.50;
printf("%d %s %f\n" , x.a , x.b , x.c);
printf("%d %s %f" , y.a,y.b, y.c);
}
Output:1101791232 21.500000
100 d 0.000000
20. Find the output(structures and union)
struct point{
int x;
int y ;
};
struct point origin , *pp;
int main()
{
pp = &origin;
printf("origin is (%d %d)\n", (*pp).x , (*pp).y);
printf("origin is (%d %d)" , pp->x , pp->y);
return 0;
}
Output : origin is (0 0 )
origin is (0 0 )
21. Find the output(branching and looping)
void main()
{
int i = -1;
printf("i =%d +i = %d\n" , i , +1);
}
Output : i=-1 i=1
22. Find the output(datatypes)
void main()
{
char not;
not=12;
printf("%d",not);
}
Output : 12
23. Find the output(branching and looping)
#define FALSE -1
#define TRUE 1
#define NULL 0
void main()
{
if(NULL)
puts("NULL");
else if(FALSE)
puts("TRUE");
else
puts(" FALSE");
}
Output : TRUE
24. Find the output(operator and expressions)
void main()
{
int k = 1;
printf("%d==1 is"" %s" ,k, k == 1 ? "TRUE":"FALSE");
}
Output : 1==1 is TRUE
25. Find the output(file manipulation)
int main()
{
FILE *ptr;
char i;
ptr=fopen("demo.c","r");
while((i=fgetch(ptr))!=EOF)
printf("%c",i);
}
26. Find the output(branching and looping)
int main()
{
int t , i ;
for ( t=4;scanf("%d",&i)-t;printf("%d\n",i))
printf("%d--",t--);
}
Output : loop runs 4 timess
27. Find the output(structures and unions)
struct emp{
int len;
char name[1];
};
int main()
{
char newname[] = "Rahul";
struct emp *p = (struct emp *) malloc(sizeof(struct emp) -1 + strlen(newname)+
1);
p->len = strlen(newname);
strcpy(p -> name, newname);
printf("%d %s\n", p->len, p->name); return 0;
}
Output : 5 Rahul
28. Find the output(algorithm)
int main() {
printf("%d %d %d %d\n",72,072,0x72,0X72);
return 0;
}
Output : 72 58 114 114
29. Find the output(operator and expression)
void main()
{
char ch;
int a;
float b;
printf("bytes occupied by ch=%d\n",sizeof(ch));
printf("bytes occupied by a=%d\n",sizeof(a));
printf("bytes occupied by b=%d\n",sizeof(b));
}
Output :
Bytes occupied by ch=1
Bytes occupied by a=4
Bytes occupied by b=4
30. Find the output(operator and expressions)
void main()
{
printf("%d\n" , sizeof('7'));
printf("%d\n" , sizeof(7));
printf("%d\n" , sizeof(7.0));
}
Output: 4
4
8
31. Find the output(datatypes)
void main()
{
char ch=291;
printf("%d %d %c\n",2147483648,ch,ch);
return 0;
}
Output : -2147483648 35 #
32. Find the output(datatypes)
void main()
{
int g;
g=300000*300000/300000;
printf("g=%d\n",g);
}
Output : -647
33. Find the output(datatypes)
void main()
{
float a;
a=4/2;
printf("%f %f\n",a,4/2);
}
Output : 2.000000 0.000000
34. Find the output(ooperator and expression)
void main()
{
printf("%d\n",sizeof(4)/sizeof(2.0));
printf("%d\n",sizeof(2.0)/sizeof(4));
}
Output : 0 2
35. Find the output(operator and expression)
void main()
{
int x=10,y=5,p,q;
p=x > 9;
q=x>3&& y!=3;
printf("p=%d q=%d \n",p,q);
}
Output : p = 1 q=1
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