# Point out the errors, if any, in the following programs:

F
Sections
1
Exercises

(a)

``````#include<stdio.h>
float circle(int);
int main()
{
float area ;
area = circle ( radius ) ;
printf ( "\n%f", area ) ;
return 0;
}
float circle(int r)
{
float a;
a = 3.14*r*r;
return a;
}``````

Output: 3.1400

(b)

``````#include<stdio.h>
int main()
{
void slogan( ) ;
int c = 5 ;
c = slogan( ) ;
printf ( "\n%d", c ) ;
return 0;
}
void slogan()
{
printf ( "\nOnly He men use C!" ) ;
}``````

Error: slogan cannot be assigned to any variable, as it has a return type of void.

(c)

``````#include<stdio.h>
void fun(int, int);
int main()
{
int i = 5, j = 2;
fun( i, j ) ;
printf ( "\n%d %d", i, j ) ;
return 0;
}
void fun(int i, int j)
{
i = i * i ;
j = j * j ;
}``````

Output: 5 2

(d)

``````#include<stdio.h>
void fun(int *, int *);
int main()
{
int i = 5, j = 2 ;
fun( &i, &j ) ;
printf ( "\n%d %d", i, j ) ;
return 0;
}
void fun(int *i, int *j)
{
*i = *i * *i ;
*j = *j * *j ;
}``````

Output: 25 4

(e)

``````#include<stdio.h>
int main()
{
float a = 13.5 ;
float *b, *c ;
b = &a ; /* suppose address of a is 1006 */
c = b ;
printf ( "\n%u %u %u", &a, b, c ) ;
printf ( "\n%f %f %f %f %f", a, *(&a), *&a, *b, *c ) ;
return 0;
}``````

Output:

1006 1006 1006
13.5 13.5 13.5 13.5 13.5

``````#include<stdio.h>
#include<stdlib.h> //It is not given in question, so assumed.
int main()
{
int i = 0;
i++;
if(i <= 5)
{