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37 lines
990 B
C

/*
* C program to read an English sentence and replace
* lowercase characters by uppercase and vice-versa.
* Output the given sentence as well as the converted
* sentence on two different lines.
*/
#include <stdio.h>
#include <ctype.h>
void main()
{
char sentence[100];
int count, ch, i;
printf("Enter a sentence \n");
for (i = 0; (sentence[i] = getchar()) != '\n'; i++)
{
;
}
sentence[i] = '\0';
/* shows the number of chars accepted in a sentence */
count = i;
printf("The given sentence is : %s", sentence);
printf("\n Case changed sentence is: ");
for (i = 0; i < count; i++)
{
ch = islower(sentence[i])? toupper(sentence[i]) :
tolower(sentence[i]);
putchar(ch);
}
}
/*
*OUTPUT:
Enter a sentence
wELCOME tO sANFOUNDRY
The given sentence is : wELCOME tO sANFOUNDRY
Case changed sentence is: Welcome To Sanfoundry
*/