C Language: Pointers 13

Question:4
C program to take input for a string, pass the string to a function and display the string in such a way that all lower case alphabets are displayed as upper case and rest are displayed as it is?
Sol:

#include<stdio.h>
void show(char *p)
{
	while(*p!='\0')
	{
		if(*p>='a' && *p<='z')
		printf("%c",*p-32);
		else
		printf("%c",*p);
		
		p++;
	}
}
int main()
{
  char n[20];
  printf("Enter any string ");
  gets(n);
  show(n);
  /* show(&n[0]); */
  return(0);
}

/* Output */
Enter any string hello world
HELLO WORLD

Question:5
C program to take input for a string , pass the string to a function and display the string in such a way that all upper case alphabets are displayed as lower case and rest is displayed as it is?
Sol:

#include<stdio.h>
void show(char *p)
{
	while(*p!='\0')
	{
		if(*p>='A' && *p<='Z')
		printf("%c",*p+32);
		else
		printf("%c",*p);
		
		p++;
	}
}
int main()
{
  char n[20];
  printf("Enter any string ");
  gets(n);
  show(n);
  /* show(&n[0]); */
  return(0);
}

/* Output */
Enter any string HELLO
hello

Question:6
C program to take input for a string, pass the string to a function and display the string in such a way that all upper case alphabets are displayed as lower case and all lower case are displayed as upper case and rest are displayed as it is(toggle case)?
Sol:

#include<stdio.h>
void show(char *p)
{
	while(*p!='\0')
	{
		if(*p>='A' && *p<='Z')
		printf("%c",*p+32);
		else
		  if(*p>='a' && *p<='z')
		  printf("%c",*p-32);
		  else
		  printf("%c",*p);
		
		p++;
	}
}
int main()
{
  char n[20];
  printf("Enter any string ");
  gets(n);
  show(n);
  /* show(&n[0]); */
  return(0);
}

/* Output */
Enter any string CoMpUtER
cOmPuTer