main function calls itself again and again. Each time the function is called its return address is stored in the call stack.
Since there is no condition to terminate the function call, the call stack overflows at runtime. So it terminates the program and results in an error.
The first clrscr() occurs inside a function. So it becomes a function call. In the second clrscr(); is a function declaration (because it is not inside any function).
Workspace
NA
SHSTTON
54
Solv. Corr.
27
Solv. In. Corr.
81
Attempted
0 M:0 S
Avg. Time
5 / 66
What is the output of the following C Program?
#include
void main()
{
int y;
scanf("%d",&y); // Given Input is 2000
if( (y%4==0 && y%100 != 0) || y%100 == 0 )
printf("%d is a leap year");
else
printf("%d is not a leap year");
}
printf takes the values of the first two assignments of the program. Any number of printf's may be given. All of them take only the first two values. If more number of assignments given in the program,then printf will take garbage values.
Workspace
NA
SHSTTON
40
Solv. Corr.
32
Solv. In. Corr.
72
Attempted
0 M:0 S
Avg. Time
7 / 66
What will be the output of the below C program.
#include
int main()
{
printf("%d", out);
return 0;
}
int out=100;
ACompiler error: undefined symbol out in function main.
The rule is that a variable is available for use from the point of declaration. Even though a is a global variable, it is not available for main. Hence an error.
Workspace
NA
SHSTTON
29
Solv. Corr.
42
Solv. In. Corr.
71
Attempted
0 M:35 S
Avg. Time
8 / 66
What will be the output of the below C program.
#include
int main()
{
extern int i; i=20;
printf("%d",sizeof(i));
return 0;
}
extern declaration specifies that the variable i is defined somewhere else. The compiler passes the external variable to be resolved by the linker. So compiler doesn't find an error. During linking the linker searches for the definition of i. Since it is not found the linker flags an error.
Workspace
NA
SHSTTON
22
Solv. Corr.
37
Solv. In. Corr.
59
Attempted
0 M:0 S
Avg. Time
9 / 66
What will be the output of the below C program.
#include
int main()
{
int i=-1;
+i;
printf("i = %d, +i = %d \n",i,+i);
return 0;
}
Unary + is the only dummy operator in C. Where-ever it comes you can just ignore it just because it has no effect in the expressions (hence the name dummy operator).
Workspace
NA
SHSTTON
48
Solv. Corr.
14
Solv. In. Corr.
62
Attempted
0 M:0 S
Avg. Time
10 / 66
What will be the output of the below C program.
#include
int main()
{
int k=1;
printf("%d==1 is %s",k,k==1?"TRUE":"FALSE");
return 0;
}
When two strings are placed together (or separated by white-space) they are concatenated (this is called as "stringization" operation). So the string is as if it is given as "%d==1 is %s". The conditional operator( ?: ) evaluates to "TRUE".
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