Write a C program that will take a string  as input from you and change the cases of the characters.If the letter is capital, change it into small and if the letter is small change it into capital letter. Look at the test case and explanation for more clarification.       Sample Input: hElLoWorld   Sample Output: HeLlOwORLD   Explanation: Here the first letter is small in the given input that's why we converted it into capital and the second letter is capital that's why we converted it into small.

Write a C program that will take a string and another number as input. Shift all the characters of the string by that numerical value. The string will consist of only small letters. Look at the explanation for more clarification.   Sample Input: smiley 5   Sample Output: xrnqjd   Explanation: Here, the first character was s and it has been shifted by 5 units, that is, s+5 = x, thus we got the character ‘x’ in the output. Similarly all the character by shifting the characters by 5 units. Take a closer look at the last character. The character was ‘y’ but after shifting it by 5 units we got ‘d’. That is because we traversed the letters in a circular fashion. After ‘y’ comes ‘z’ then ‘a’ then ‘b’ then ‘c’ and then finally ‘d’. Thus, ‘y’+5 will be ‘d’ in our program. Be careful about this case.

Write a C program to count the total number of words in a string   Test Data: Input the string: the world is great Output: Total number of words in the string is: 4