swap_char(address variable 1,address variable 2)

Swap takes addresses of two character type variables as arguments and swap value of them.

Syntax:

swap_char(address of variable 1 , address of variable 2);

Examples:

#include<cquery.h>
main()
{
char var1 = 'a' , var2 ='b';
swap_char(&var1,&var2); //now var1 = 'b' and var2 = 'a'
printf("var1 = %c , var2 = %c ",var1,var2); 
}

Order of arguments doesn't matter as you can swap them as also

#include<cquery.h>
main()
{
char var1 = 'a' , var2 = 'b';
swap_char(&var2,&var1); //now var1 = 'b' and var2 = 'a'
printf("var1 = %c , var2 = %c ",var1,var2);
}

But remember arguments should be direct address or you can use pointers as

#include<cquery.h>
main()
{
char var1 = 'a' , var2 = 'b';
int *a,*b;
a = &var1;
b = &var2;
swap_char(a,b); //now var1 = 'b' and var2 = 'a'
printf("var1 = %c , var2 = %c ",var1,var2);
}