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× Between a Rock and a Hard Place Given a string in a variable named text, write code that finds the substring that lies between the substring 'rock' and the substring 'hard place'. For example, if text contains 'here is a rock and here is a hard place', then the result would be ' and here is a'. Assign the result to a variable named between. Assume that text already has a value that contains the substrings 'rock' and 'hard place' in that order. Print the Longer String Write code that prints the longer of two strings that are stored in the variables str1 and str2. If both strings are equal in length, print the value of str1. Assume that both variables have already been given values. Print Product Id Write code that examines a string stored in a variable called product_id and prints an appropriate version of the id. If the id is composed of only numeric digits, print it as is. If it is composed of a combination of alphabetic letters and digits, print the id with all alphabetic letters in uppercase. Otherwise (if there are any other types of characters in the id), print it with all alphabetic letters in lowercase. Assume that the product id has already been initialized. Double Word Write code that constructs a string made up of each character in a string variable named word repeated twice. For example, if word contains 'Python', the resulting string would be 'PPyytthhoonn'. Store the constructed string in a variable called double_word. Assume that word has already been initialized. How Do You Spell That? Write code that produces a string made up of each character in a string variable named word separated by a dash. For example, if word contained the string 'Python', the resulting string would be 'P-y-t-h-o-n'. Do NOT include a dash after the last character. Store the resulting string in a variable named spell_string. Assume that the variable word has already been initialized. Generate Acronyms Given a phrase stored in the variable phrase, write code to construct an acronym made up of the first letter of each word in the phrase. For example, the phrase 'Portable Network Graphics' would produce the acronym 'PNG'. Store the result in a variable named acronym, ensuring that it is composed of all uppercase letters. Assume that there is no whitespace on either end of the phrase and that one space character separates each word. Back to Front Write code that constructs a string made by flipping the front and back halves of a string stored in a variable named flip_me. For example, if flip_me is 'bookmark', the resulting string is 'markbook'. Store the result in a variable named flipped. Assume that the variable flip_me has already been given a value and that it contains an even number of characters. Count It Write code that determines how many times the string 'it' appears in the character string stored in a variable named sentence. Store the result in the variable it_count. Assume that sentence has been initialized. Ideas and Thoughts Write code that prints a string made up of the string stored in the variable sentence with all instances of the word 'idea' replaced with the word 'thought'. Assume the sentence variable has already been initialized. Between a Rock and a Hard Place Given a string in a variable named text write code that finds the $5.00
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× In this practice class, we will study the use of the fork() and execlp() functions in combination. See the skeleton code given here. - Skeleton C Program: fork + execlp #include #include int main (int argo, char *argv[]) { int pid; /* fork another process */ pid = fork(); if (pid < 0) { /* error occurred */ fprintf (stderr, "Fork Failed"); exit (-1); } else if (pid == 0) { /* child process */ execlp ("/bin/ls", "ls", NULL); } else { /* parent process */ /* parent will wait for the child to complete */ wait (NULL); printf ("Child Complete"); exit (0); } } Assignment: Q1. Write a C code for implementing fork + execlp combination where execlp is used in child to do the following: (A) starts a simple program printing "Hello World" on the screen, and then (B) uses the system() function to execute the "ps" command. The parent process uses the system() function to execute the "ls" command and then waits for the child to finish. Measure the total time to execute the program using the system clock. In this practice class we will study the use of fork and execlp functions in a combination See $5.00
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