C Programming - Functions
Exercise : Functions - Yes / No Questions
1.
Functions cannot return a floating point number
Answer: Option
Explanation:
A function can return floating point value.
Example:
#include <stdio.h>
float sub(float, float); /* Function prototype */
int main()
{
float a = 4.5, b = 3.2, c;
c = sub(a, b);
printf("c = %f\n", c);
return 0;
}
float sub(float a, float b)
{
return (a - b);
}
Output:
c = 1.300000
2.
Every function must return a value
Answer: Option
Explanation:
No, If a function return type is declared as void it cannot return any value.
3.
If a function contains two return statements successively, the compiler will generate warnings. Yes/No ?
Answer: Option
Explanation:
Yes. If a function contains two return statements successively, the compiler will generate "Unreachable code" warnings.
Example:
#include<stdio.h>
int mul(int, int); /* Function prototype */
int main()
{
int a = 4, b = 3, c;
c = mul(a, b);
printf("c = %d\n", c);
return 0;
}
int mul(int a, int b)
{
return (a * b);
return (a - b); /* Warning: Unreachable code */
}
Output:
c = 12
4.
Maximum number of arguments that a function can take is 12
Answer: Option
Explanation:
No, C can accept upto 127 maximum number of arguments in a function.
5.
Will the following functions work?
int f1(int a, int b)
{
return ( f2(20) );
}
int f2(int a)
{
return (a*a);
}
Answer: Option
Explanation:
Yes, It will return the value 20*20 = 400
Example:
#include <stdio.h>
int f1(int, int); /* Function prototype */
int f2(int); /* Function prototype */
int main()
{
int a = 2, b = 3, c;
c = f1(a, b);
printf("c = %d\n", c);
return 0;
}
int f1(int a, int b)
{
return ( f2(20) );
}
int f2(int a)
{
return (a * a);
}
Output:
c = 400
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