depending on the name it is invoked with as found in argument.
#include
#include
void lower_to_upper();
void upper_to_lower();
void main()
{
int n;
clrscr();
printf("
Please enter your choice.");
printf("
(1) for upper to lower conversion.");
printf("
(2) for lower to upper conversion.");
printf("
CHOICE:- ");
scanf("%d",&n);
switch (n)
{
case 1:
{
printf("Please enter a string in upper case.");
printf("
String will be terminated if you press Ctrl-Z.");
printf("
STRING:- ");
upper_to_lower();
break;
}
case 2:
{
printf("Please enter a string in lower case.");
printf("
String will be terminated if you press Ctrl-Z.");
printf("
STRING:- ");
lower_to_upper();
break;
}
default:
printf("ERROR");
}
printf("
HAVE A NICE DAY! BYE.");
getch();
}
void upper_to_lower()
{
int i,j;
char c4[80],c3;
for (i=0;(c3=getchar())!=EOF;i++)
c4[i]=(c3>='A' && c3<='Z')?('a' + c3 -'A'):c3;
printf("
The lower case equivalent is ");
for (j=0;j putchar(c4[j]);
return;
}
void lower_to_upper()
{
int i,j;
char c2[80],c1;
for (i=0;(c1=getchar())!=EOF;i++)
c2[i]=(c1>='a' && c1<='z')?('A' + c1 -'a'):c1;
printf("
The upper case equivalent is ");
for (j=0;j putchar(c2[j]);
return;
}