Happy Codings - Programming Code Examples
Html Css Web Design Sample Codes CPlusPlus Programming Sample Codes JavaScript Programming Sample Codes C Programming Sample Codes CSharp Programming Sample Codes Java Programming Sample Codes Php Programming Sample Codes Visual Basic Programming Sample Codes


C Programming Code Examples

C > Strings Code Examples

Input a String with atleast one Number, Print the Square of all the Numbers in a String

/* Input a String with atleast one Number, Print the Square of all the Numbers in a String */ #include <stdio.h> #include <string.h> #include <ctype.h> #include <math.h> struct detail { int number; int square; }; int update(struct detail [], int, int); int toint(char []); int main() { struct detail s[10]; char unit[20], string[100]; char c; int num, x, j = 0, count = 0; printf("Enter string: "); x = 0; do { fflush(stdin); c = getchar(); string[x++] = c; } while (c != '\n'); string[x - 1] = '\0'; printf("The string entered is: %s\n", string); for (x = 0; x < strlen(string); x++) { while (x < strlen(string) && !isspace(string[x])) { unit[j++] = string[x++]; } if (j != 0) { unit[j] = '\0'; num = toint(unit); count = update(s, num, count); j = 0; } } printf("*****************\nNumber\tSquare\n*****************\n"); for (x = 0; x < count; x++) { printf("%d\t %d\n", s[x].number, s[x].square); } return 0; } int update(struct detail s[], int num, int count) { s[count].number = num; s[count].square = num * num; return (count + 1); } int toint(char str[]) { int len = strlen(str); int x, num = 0; for (x = 0; x < len; x++) { num = num + ((str[len - (x + 1)] - '0') * pow(10, x)); } return num; }

C supports nesting of loops in C. Nesting of loops is the feature in C that allows the looping of statements inside another loop. Any number of loops can be defined inside another loop, i.e., there is no restriction for defining any number of loops. The nesting level can be defined at n times. You can define any type of loop inside another loop; for example, you can define 'while' loop inside a 'for' loop.

Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,

Flush stream. If the given stream was open for writing (or if it was open for updating and the last i/o operation was an output operation) any unwritten data in its output buffer is written to the file. If stream is a null pointer, all such streams are flushed. In all other cases, the behavior depends on the specific library implementation. In some implementations, flushing a stream open for reading causes its input buffer to be cleared (but this is not portable expected behavior).

While loop is also known as a pre-tested loop. In general, a while loop allows a part of the code to be executed multiple times depending upon a given boolean condition. It can be viewed as a repeating if statement. The while loop is mostly used in the case where the number of iterations is not known in advance. The while loop evaluates the test expression inside the parentheses (). If test expression is true, statements inside the body of while loop are executed. Then, test expression is evaluated again. The process goes on until test expression is evaluated to false. If test expression is false, the loop terminates.

Get string length. Returns the length of the C string str. The length of a C string is determined by the terminating null-character: A C string is as long as the number of characters between the beginning of the string and the terminating null character (without including the terminating null character itself).

Read formatted data from stdin. Reads data from stdin and stores them according to the parameter format into the locations pointed by the additional arguments. The additional arguments should point to already allocated objects of the type specified by their corresponding format specifier within the format string. In C programming, scanf() is one of the commonly used function to take input from the user. The scanf() function reads formatted input from the standard input such as keyboards. The scanf() function enables the programmer to accept formatted inputs to the application or production code. Moreover, by using this function, the users can provide dynamic input values to the application.

When we say Input, it means to feed some data into a program. An input can be given in the form of a file or from the command line. C programming provides a set of built-in functions to read the given input and feed it to the program as per requirement. When we say Output, it means to display some data on screen, printer, or in any file. C programming provides a set of built-in functions to output the data on the computer screen as well as to save it in text or binary files. C programming treats all the devices as files. So devices such as the display are addressed in the same way as files and the following three files are automatically opened when a program executes to provide access to the keyboard and screen.

In C, the "main" function is treated the same as every function, it has a return type (and in some cases accepts inputs via parameters). The only difference is that the main function is "called" by the operating system when the user runs the program. Thus the main function is always the first code executed when a program starts. main() function is a user defined, body of the function is defined by the programmer or we can say main() is programmer/user implemented function, whose prototype is predefined in the compiler. Hence we can say that main() in c programming is user defined as well as predefined because it's prototype is predefined. main() is a system (compiler) declared function whose defined by the user, which is invoked automatically by the operating system when program is being executed.

An expression containing logical operator returns either 0 or 1 depending upon whether expression results true or false. Logical operators are commonly used in decision making in C programming. These operators are used to perform logical operations and used with conditional statements like C if-else statements.

Get character from stdin. Returns the next character from the standard input (stdin). It is equivalent to calling getc with stdin as argument. A getchar() function is a non-standard function whose meaning is already defined in the stdin.h header file to accept a single input from the user. In other words, it is the C library function that gets a single character (unsigned char) from the stdin. However, the getchar() function is similar to the getc() function, but there is a small difference between the getchar() and getc() function of the C programming language.

The if-else statement is used to perform two operations for a single condition. The if-else statement is an extension to the if statement using which, we can perform two different operations, i.e., one is for the correctness of that condition, and the other is for the incorrectness of the condition. Here, we must notice that if and else block cannot be executed simiulteneously. Using if-else statement is always preferable since it always invokes an otherwise case with every if condition.

Checks whether c is a white-space character. The isspace() function checks whether a character is a white-space character or not. If an argument (character) passed to the isspace() function is a white-space character, it returns non-zero integer. If not, it returns 0. The C isspace function is one of the Standard Library Functions available in C programming, which is useful to check the given character is a space or not.

Raise to power. Returns base raised to the power exponent: baseexponent. The function pow() is used to calculate the power raised to the base value. It takes two arguments. It returns the power raised to the base value. It is declared in "math.h" header file.

#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program. Here are the two types of file that can be included using #include:

The for loop is used in the case where we need to execute some part of the code until the given condition is satisfied. The for loop is also called as a per-tested loop. It is better to use for loop if the number of iteration is known in advance. The for-loop statement is a very specialized while loop, which increases the readability of a program. It is frequently used to traverse the data structures like the array and linked list.



C program to find factorial of a number using recursion. The factorial of a 'positive number' n is given by: factorial of n (n!) = 1*2*3*4....n The factorial of a 'negative number' does not


Take a string as input and store it in the array s[]. Load each character of the array s[] into the array stack[]. Use variables front and top to represent the last and top element of the

Record the time program starts execution. Record the current time, using the alternate method of. Convert the time_t value into a type tm structure. Create and display a string

Dynamic string arrays in C language. Print the array of strings. Free the string array, Note: You must delete each individual string before you delete the array of pointers...


Picks a random value withing range low-high. Value returned seeds the rand() function. Print version information and exit. First seed the random function. Add line, to the array...