You cannot submit for this problem because the homework's deadline is due.

Ex3. Operations on strings (10 marks)

Tip: strings vs. char arrays in MATLAB

In MATLAB, "abc" is actually different from 'abc'. Rigorously speaking, only the former is called a string. The latter is called a char array. However, strings were not introduced until MATLAB R2016b (quite late!) and most built-in functions still expect char arrays instead of strings as parameters. Thus, generally, please always use 'abc' instead of "abc". For more information about strings, see doc string. In VG101 labs, we mean char arrays when we say strings.

Ex3_1. Conversion

Get a number represented as a string from user input using input('', 's') (notice the second parameter 's') and convert the string to a number.

Hint: Use str2num() . See its documentation and pay attention to the format requirements. Also read the note on the documentation page.

Sample Test Cases

Input:

123.4

Output:

  123.4000

Input:

wtcl555

Output:

Ex3_2. String concatenation

Concatenate two strings s1 and s2 obtained from user input.

Hint: You can either use strcat() or regard the strings as arrays. Please solve the problem using both ways.

Sample Test Case

Input:

wtcl
555

Output:

wtcl555
wtcl555