Question

Question 1: Consider the following specification for a program. The program reads two inputs from the user: a string s and an integer number n. The program concatenates s with itself n-1 times, if the following conditions are satisfied: 1- s consists of 3 characters. 2- The first character in s is a letter. 3- s consists of letters (A-Z a-z) and digits only (0-9) 4-0< n<5 If any of these conditions is not satisfied, the program terminates and prints "ERROR IN INPUTS" message. For example, let s-Ab3" and n-3: in this case the program output is "Ab3Ab3Ab3". If n-5, the program output is "ERROR IN INPUTS". Define the equivalence classes and boundary values and develop a set of test cases to cover them. Assume that all user inputs are of the required types. To show the test coverage, fill a table with the following columns: Test Case Input Values Expected Equivalence Invalid Identifier Output and Equivalence Classes Bounds Covered Classes and Bounds Covered

Answer 1

Question:

Write C program to read two inputs

1. a string variable 's' and

2. a integer variable 'n'

C Program should concatenates s with itself with n-1 times if following conditions are satisfied

condition 1: s contains only 3 characters

condition 2: the first character in s is a letter

condition 3: s consists of letters (A-Z a-z) and digits only (0-9)

condition 4: n should be greater than 0 and lesser than 5

C Code as follows:

/* Include needed header files */

#include <stdio.h>

#include <string.h>

void str_cat(char *s1,int n1)

{

//store n-1 value into a variable limit

int limit = n1-1;

char final_str[100];

//first use string copy api to copy param from s1 to final_str

strcpy(final_str,s1);

for(int i = 0;i < limit;i++)

{

//store the concatenation string values to final_str

strcat(final_str,s1);

}

//copy back the concatenation string to the original string s1

strcpy(s1,final_str);

printf("Concatenated String is : %s and Temporary String is : %s", s1,final_str);

}

int main(void)

{

//string s - declaration

char s[100];

//int n - declaration

int n;

//Get the input string from User

printf("Enter the Input String:");

scanf("%s",&s);

//Get the integer number count From User

printf("Enter the Integer Number Count Integer Value");

scanf("%d",&n);

//store the first letter of string s to char variable c

char c = s[0];

/* do the below condition validation , if any condition validation fails return Error

condition 1: s contains only 3 characters

condition 2: the first character in s is a letter

condition 3: s consists of letters (A-Z a-z) and digits only (0-9)

condition 4: n should be greater than 0 and lesser than 5 */

if ((strlen(s) > 3) || ((n <= 0) || (n >= 5)) || (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))))

{

printf("ERROR IN INPUTS");

}

else

{

//do input string value concatenation till n-1 times

str_cat(s,n);

}

return 0;

}

Successful Output is :

Enter the Input String: Ab3

Enter the Integer Number Count Integer Value: 3

Concatenated String is : Ab3Ab3Ab3 and Temporary String is : Ab3Ab3Ab3

Err Output 1 is :

Enter the Input String: 3Ab

Enter the Integer Number Count Integer Value: 3

ERROR IN INPUTS

Error Output 2 is :

Enter the Input String: Ab3

Enter the Integer Number Count Integer Value: 0

ERROR IN INPUTS

Error Output 3 is :

Enter the Input String: Ab3

Enter the Integer Number Count Integer Value: 5

ERROR IN INPUTS

Please ran the program in C Compiler Compatible OS and give different inputs and check the output results.