Compute the weakest precondition for each of the following statements based on their postconditions. b= 2*a + 3*b - 1; a = 2*b {a >= 2} if ( x==4) x = y /2+3; else x = y / 2; {x > 1}
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- Compute the weakest precondition for the sequence of statements: (Statement 1) b = 2b + 1; (Statement 2) b = b-3{b < 0}Compute the weakest preconditions of the following statements for the given postconditions. Assume all variables are integers1)a = 2*b + 1;b = a*a + 1;{ a > 10 } 2)if (b > 0)a = 4*b - 10;elsea = b + 172;{ a > 0 }In a Java if-statement, a _________ goes in the blank in the following: If(_________)
- T/F 2. In Java, only if and if-else expressions are used in selection statements.Write the following statements in terms of ?, ?, ?, and logical connectives:a. Either 4 > 1 or 4 < 5.b. If 3 ≤ 3 , then 2 > 2. c. It is not the case that 2 > 2 or 4 > 1Can I please have the answer in C++ language 4.7: Time Machine Your time machine is capable of going forward in time up to 24 hours. The machine is configured to jump ahead in minutes. To enter the proper number of minutes into your machine, you would like a program that can take a start time (in hours, minutes, and a Boolean indicating AM or PM) and a future time (in hours, minutes, and a Boolean indicating AM or PM) and calculate the difference in minutes between the start and future time. A time is specified in your program with three variables: int hours, minutes; bool isAM; // You can also use a char, i.e. A or P for example, to represent 11:50 PM, you would store: hours = 11,minutes = 50, isAM = false or if using a char, hours = 11,minutes = 50, isAM = 'A' This means that you need six variables to store a start and future time. Write a program that allows the user to enter a start time and a future time. Include a function named computeDifference that takes the six variables as…
- Explain these c++ statements void bar(int panam) {panam +=1;}An electricity board charges the following rates to domestic users:-Units consumed TariffFor the first 100 units Rs. 5 per unitFor the next 200 units Rs.10 per unitFor the next 300 units Rs.15 per unitWrite a C++ program using class to read the names of users and number of units consumed andprint out the charges (in Rs.) with names. Write in CPP languageWrite a program that substitutes an overloaded += operator for the overloaded + operator. This operator should allow statements like : A2 + = A!; Where A1 is added (concatenated) to A2 and the result is left in A2. The operator should also permits the results of the operation to be used in other calculations, as in A3 = A2 + = A1
- PROBLEM: Write a C++ program that will allow the user to input the First Name, Last name, Middle Initial, and grade of a student. The following conditions must be observed: If the gradeinput is 96-100, the remarkis “ you performed an excellent job! Keep it up !” If the gradeinput is 91-95, the remarkis “ you performed a very satisfactory Job! Keep it up !” If the gradeinput is 86-90, the remarkis “ you have satisfactory performance, you can improve some more. ” If the gradeinput is 80-85, the remarkis “ your performance is fair, try harder” If the gradeinput is 75-79, the remarkis “ your performance needs Improvement, you can do it” If the gradeinput is below 75, the remark is “ we’re sorry but you failed, we know you can do better next time”Mark the following statements as true or false. i. An identifier can be any sequence of digits and letters. ii. In C++, there is no difference between a reserved word and a predefined identifier. iii. A C++ identifier can start with a digit. iv. The operands of the modulus operator must be integers. v. If a = 4; and b = 3; then after the statement a = b; the value of b is still 3. vi. The result of a logical expression cannot be assigned to an int variable. vii. Every if statement must have a corresponding else. viii. The expression in the if statement: if (score = 30) grade = 'A'; always evaluates to true. ix. The expression: (ch >= 'A' && ch = 'Z'. x. The expression !(x > 0) is true only if x is a negative number.Write assignment statements for the following: Assign a value of 1 to between if n is in the range -k through +k, inclusive; otherwise assign a value of 0 Assign a value of 1 to uppercase if ch is an uppercase letter; otherwise, assign a value of 0. Assign a value of 1 to divisor if m is a divisor of n; otherwise, assign a value of 0.