It should be : long int m, count; long float temp; Answer : Error. Answer : False. Answer : True. If valid , give the value of the expression ; otherwise give reason. Because the number 3 is int type. Explain the output. So the expression is true and the statement after it is executed. So the output is TRUE. But getchar does not use any format specifiers it only takes character as input. At a time scanf can receive multiple data types as inputs.
But getchar can't do this. As getchar is a macro thats why it helps to make program run faster. The getchar function accepts any character keyed in. But it stops reading that string when the first whitespace character is encountered. A whitespace character is either a space, a tab, or a newline. Trailing zeros and trailing decimal point will not be displayed. The getchar function may be called successively to read the characters contained in a line of text thus we can use the getchar function to read multi character strings.
The putchar function may be called successively to output the characters contained in a line of text thus we can use the putchar function to output multi character strings.
For example, the following program segment output characters from keyboard one after another. Input data can be entered into computer from a standard input device by means of the C library function scanf. This function can be used to enter any combination of numerical values, single characters and strings. The function returns the number of data items that have been entered successfully.
Control string and arguments are separated by commas. Control string also known as format string contains field specifications, which direct the interpretation of input data. Blanks, tabs, or newlines. Blanks, tabs and newlines are ignored. The data type character indicates the type of data that is to be assigned to the variable associated with the corresponding argument.
The field width specifier is optional. The main purpose of commonly used conversion characters in a scanf function is these indicate what type of data we take as intput. It is possible to limit the number of such characters by specifying a maximum field width for that data item. This is because the space acts as a data item separator. Output data can be written from the computer onto a standard output device using the library function printf. This function can be used to output any combination of numerical values, single characters and strings.
The printf statement provides certain features that can be effectively exploited to control the alignment and spacing of print-outs on the terminals. Characters that will be printed on the screen as they appear. Format specifications that define the output format for display of each item.
The control string indicates how many arguments follow and what their types are. The arguments arg1, arg2, …, argn are the variables whose values are formatted and printed according to the specifications of the control string. The arguments should match in number, order and type with the format specification.
The main purpose of commonly used conversion characters in a printf function is these indicate what type of data we print as output. But control string in a scanf function can include blanks, tabs, or newlines. But blanks, tabs or newlines are ignored. Control string in a printf function can consists of characters that will be printed on the screen as they appear.
The number is written right-justified in the given field width. The unrecognized characters will be read into the computer but not assigned to an identifier.
Ans: False. Ans: True. Ans: switch. Ans: if…else. Solution: a 2,0 b 1,0 5. Correct answer: switch y b case 10; Answer : Error. Correct answer: case Semicolon ; after break. That means there will be no output. Answer: n-1 b The statements is use to skip a part of the statements in a loop. Answer: continue. Answer: infinite d The sentinel controlled loop is also; known as loop. Answer: indefinite repetition.
Answer: definite repetition. If yes, explain its consequences. No, we cannot change the control variable in both the for statement and the body of the loop. It is a logic error. If we change the value of the control variable in for statement the number of iterations will be changed. Explain a typical use of it. It is not a syntax error, it is a logical error. There are many reasons for this. When goto is used, many compilers generate a less efficient code.
In addition, using many of them makes a program logic complicated and renders the program unreadable. But since a goto statement can transfer the control to any place in a program, it is useful to provide branching within a loop. Another important use of goto is to exit from a deeply nested loops when an error occurs. To choose one of the three loop supported by C, we may use the following strategy: 1. Analyse the problem and see whether it required a pre-test or post-test loop.
If it requires a post-test loop, then we can use only one loop, do while. If it requires a pre-test loop, then we have two choices: for and while. Decided whether the loop termination requires counter-based control or sentinel-based control. Use for loop it the counter-based control is necessary. Use while loop if the sentinel-based control is required. Note that both the counter-controlled and sentinel-controlled loops can be implemented by all the three control structures.
It does not matter if we know the number of iterations or not, the for loop is the same. The test-condition is evaluated and if the condition is true, then the body of the loop is executed. After execution of the body, the test-condition is once again evaluated and if it is true, the body is executed once again. This process of repeated execution of the body continues until the test-condition finally becomes false and the control is transferred out of the loop.
On exit, the program continues with the statement immediately after the body of the loop. The body of the loop may have one or more statements. The braces are needed only if the body contains two or more statements.
However, it is a good practice to use braces even if the body has only one statement. At the end of the loop, the test-condition in the while statement is evaluated. If the condition is true, the program continues to evaluate the body of the loop once again. This process continues as long as the condition is true. When the condition becomes false, the loop will be terminated and the control goes to the statement that appears immediately after the while statement.
Since the test-condition is evaluated at the bottom of the loop, the do…while construct provides an exit-controlled loop and therefore the body of the loop is always executed at least once. A goto is often used at the end of a program to direct the control to go to the input statement, to read further data.
The variables i and count are known as loop-control variables. The value of the control variable is tested using the test-condition. If the condition is true, the body of the loop is executed; otherwise the loop is terminated and the execution continues with the statement that immediately follows the loop. When the body of the loop is executed, the control is transferred back to the for statement after evaluating the last statement in the loop.
If the condition is satisfied, the body of the loop is again executed. This process continues till value of the control variable fails to satisfy the test-condition. When the loops are nested, the break would only exit from the loop containing it. That is, the break will exit only a single loop. Exit …….
Exit ….. Since a goto statement can transfer the control to any place in a program, it is useful to provide branching within a loop. Another important use of goto is to exit from deeply nested loops when an error occurs. It can be used to transfer the control out of a loop or nested loops when certain peculiar conditions are encountered.
C supports a statement called the continue statement. The continue, as the name implies, causes the loop to be continued with the next iteration after skipping any statements in between. The format of the continue statement is simply. Assume that all the variables have In the problem of been declared and assigned values. B: The value of m will be decreased by 10 from 90 to 0.
So ultimately the value of m will be 0. Answer: True. Answer: False. Answer: index. Answer: run time. Answer: pointer variable. Answer: multidimensional e ……… is the process of arranging the elements of an array in order. Answer: sorting. Answer: Incorrect. Which for the following declarations are correct? Answer: This is correct. Whey is an array called a data structure? A data structure is a particular way of storing and organizing data in a computer so that it can be used efficiently.
An array is a data structure consisting of a collection of elements values or variables , each identified by at least one array index or key. An array is stored so that the position of each element can be computed from its index. How is it created? Give a typical example of a dynamic array? Dynamic array: The process of dynamic memory allocation and the arrays created at run time are called dynamic array.
How is it created: Dynamic arrays are created using pointer variables and memory management functions Malloc , calloc and realloc. Typical example of use of a dynamic array: The concept of dynamic arrays is used in creating and manipulating data structures such as linked lists, stacks and queues. Answer: Array size missing in the declaration. Multi-dimensional arrays may be initialized by following their declaration with a list of initial values enclosed in braces.
We can initialize a three dimensional array at the time as we initialize any other variable or array. We have also initialized multidimensional array with some integer values. For example, consider 3D array as a collection of tables, to access or store any element in a 3D array we need to know first table number then row number and lastly column number. So applying above logic, the value 25 located in table no 1 row no 1 and column no 1, hence the address is arr[1][1][1].
Answer: code. Answer: strcpy c The function strncat has three parameters. Answer: three d To use the function atoi in a program, we must include the header file ……. Answer: gets. Ans: strlen. Answer: strstr. Answer: One, another.
Answer: Puts. A whitespace is included with blanks , tabs ,carriage returns , form feeds and new lines. Explain how this feature helps in string manipulations. We know that a string is not a data types in c, but it is considered a data structure stored in array. The string is a variable-length structure and is stored in a fixed-array. It is automatically terminate by null character. It takes the form: strcpy string1, string2 ; and assigns the contents of string 2 to string 1.
The function strncpy copies only the left-most n characters of the source string to the target string variable. This is a three-parameter function and is invoked as follows: strncpy s1,s2,5 ; This statement copies the first 5 characters of the source string s2 into the target string s1.
It takes the following form: strcat string1,string2 ; string1 and string2 are character arrays. It does so by removing the null character at the end of string1 and placing string2 from there. If they are not, it has the numeric difference between the first non-matching characters in the strings. It takes the form: strcmp string1,string2 ; string1 and string2 may be string variables or string constansts. The strncmp function compares the left-most n characters of two string.
Answer: False b A function in C should have at least one argument. Answer: True c A function can be defined and placed before the main function. Answer: False d A function can be defined within the main function. Answer: True l A function without a return statement is illegal. Answer: True o The return type of a function int by default. TubeMate 3. Google Play. Watch Tiger Woods golf again. PS5 restock updates.
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