Which of the following is not a preprocessor directive?
Answer: D
#ifelse is not a preprocessor directive. #error, #pragma, #if are preprocessor directives. There is a preprocessor directive, #elif, which performs the function of else-if.
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Consider the following statements
#define hypotenuse (a, b) sqrt (a*a+b*b);
The macro call hypotenuse(a+2,b+3);
Answer: D
No answer description available for this question.
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What will be the output of the program?
#include
#define JOIN(s1, s2) printf("%s=%s %s=%s \n", #s1, s1, #s2, s2);
int main()
{
char *str1="India";
char *str2="BIX";
JOIN(str1, str2);
return 0;
}
Answer: B
No answer description available for this question.
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What is the output of this program?
#include
#define i 5
int main()
{
#define i 10
printf("%d",i);
return 0;
}
Answer: B
The preprocessor directives can be redefined anywhere in the program. So the most recently assigned value (#define i 10) will be taken.
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_______________ is the preprocessor directive which is used to end the scope of #ifdef.
Answer: C
The #ifdef preprocessor directive is used to check if a particular identifier is currently defined or not. If the particular identifier is defined, the statements following this preprocessor directive are executed till another preprocessor directive #endif is encountered. #endif is used to end the scope of #ifdef.
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What will be the output of the following C code?
#include
void f()
{
#define sf 100
printf("%d",sf);
}
int main()
{
#define sf 99;
f();
printf("%d",sf);
}
Answer: A
Macro definition is global even if it is appears within the function scope. In this case the macro sf is defined in the function f(). Hence it results in a compile time error.
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The preprocessor provides the ability for _______________
Answer: D
The preprocessor provides the ability for the inclusion of header files, macro expansions, conditional compilation, and line control.
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What is the output of following program?
#include
#define macro(n, a, i, m) m##a##i##n
#define MAIN macro(n, a, i, m)
int MAIN()
{
printf("GeeksQuiz");
return 0;
}
Answer: B
No answer description available for this question.
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Will the program compile successfully?
#include
int main()
{
#ifdef NOTE
int a;
a=10;
#else
int a;
a=20;
#endif
printf("%d\n", a);
return 0;
}
Answer: A
No answer description available for this question.
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Point out the error in the program
#include
int main()
{
int i;
#if A
printf("Enter any number:");
scanf("%d", &i);
#elif B
printf("The number is odd");
return 0;
}
Answer: A
The conditional macro #if must have an #endif. In this program there is no #endif statement written.
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