1) Algorithm A1: length(s) 1. Initialize len to 0. 2. Set a variable to the beginning index of string s. 3. Repeat the following step till the string terminator is encountered. 4. len = len +1 5. Exit
1)
1. Initialize len to 0.
2. Set a variable to the beginning index of string s.
3. Repeat the following step till the string terminator is encountered.
4. len = len +1
5. Exit
2) Algorithm A2: concatenate (s1, s2)
1. Initialize i = strlen(s1)
2. Initialize j = strlen(s2)
3. Initialize count =0;
/ * This segment copies characters of s2 into array s1 * /
4. Repeat steps 5 to 7 while count <= j
5. s1[i] = s2[count]
6. i = i + 1
7. count = count + 1
8. Exit
3) Algorithm A3: substring (s, ip, len)
1. Initialize i = ip and count = 0
2. Use an array „dest‟ to hold the required substring
3. Repeat steps 4 ,5 and 6 while count < len
4. dest[count] = s[i]
5. count = count +1
6. i = i + 1
7. Insert string terminator at end of dest
8. Exit
4) Algorithm A4: index(T, P)
1. Initialize i = 0 and max = t – p + 1 / * t and p are respectively lengths
of strings T and P * /
2. Repeat steps 3 to 6 while i < max
3. Repeat for j = 0 to p – 1
5. Return index i and exit
6. i = i + 1
7. Return –1 for no match
8. Exit
LAB TASKS
1. Implement the above algorithms using functions in C++
2. Run your coding of Algorithm A1 with the following test case
s = “Computer
3. Run your coding of Algorithm A2 with the following test cases
s1 = “But” and s2 = “ter”
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