C Articles - Page 122 of 134

In this section we will see how to write a program in C that cannot be terminated by the Ctrl + C key.The Ctrl + C generates the keyboard interrupt, and it stops the execution of the current process. Here when we will press the Ctrl + C key, it will print a message then continues the execution. To use this functionality, we will use the signal handling technique in C. When the Ctrl + C is pressed it generates SIGINT signal. There are some other signals and their functionalities in the following list.SignalDescriptionSIGABRTIndicates Abnormal terminationSIGFPE Indicates floating point exceptionSIGILL Indicates invalid ... Read More

Let us see how to write a C program in which we can print the text “Hello World” without using any semicolon.We can simply write the text by using the line printf(“Hello World”); in the main() function.But there is a semicolon at the end of the line. To avoid the semicolon, we can follow some trick. We can use the same printf() statement inside if condition. As the printf() statement returns the length of the text, so it is non zero value, so the if statement will be true. Thus the text will be written on screen.Example Code#include main() { ... Read More

Here we will see how to write a C program that can print numbers from 1 to 100 without using any kind of loops.This problem can be solved using the recursion. We will create a function that will be called recursively. As we know that a recursive function has basically two sections. The base case and the recursive call and other operation. In this function the base case is the argument n is greater than 1. Until it reaches 1, the function will be called recursively. Now at the end it will print the value of n. Thus the entire ... Read More

In this section we will see how to check whether a number is odd or even without using any kind of conditional statements like (=, ==).We can easily check the odd or even by using the conditional statements. We can divide the number by 2, then check whether the remainder is 0 or not. if 0, then it is even. Otherwise we can perform AND operation with the number and 1. If the answer is 0, then it is even, otherwise odd.Here no conditional statements can be used. We will see two different methods to check the odd or even.Method ... Read More

Yes, let us first see the working of ternary operator in C or C++ language.X=(X > 10 && ( X-Y) < 0) ?: X:(X-Y);Here is the demo code in C language. After that we will check in MySQL. The C code is as follows −#include int main() {    int X;    int Y;    int result;    printf("Enter the value for X:");    scanf("%d", &X);    printf("Enter the value for Y:");    scanf("%d", &Y);    result=( X > 1 && (X-Y) < 0) ? X: (X-Y);    printf("The Result is=%d", result);    return 0; }The snapshot of C ... Read More

An array arr[i] is interpreted as *(arr+i). Here, arr denotes the address of the first array element or the 0th index element. So *(arr+i) means the element is at i distance from the first element of the array. So, array index starts from 0 as initially i is 0 which means the first element of the array. In this article, we will see an example of C and C++ code to understand the reason why an array starts from index 0. Why Array Index Starts from Zero? The array index starts from zero as it provides better efficiency and ... Read More

The function strncpy() is used to copy the specified number of characters to the destination from the source. It is similar to the strcpy() function. In strncpy() function, we can specify the at most how many characters we want to copy from source to destination. In this article, we have a source string. Our task is to copy this string into a destination string using the strncpy() function and understand why it is insecure to use in C++. Syntax of strncpy() Function The syntax of the strncpy() function is as follows: char *strncpy(char *destination, char *source, size_t n); ... Read More

An array in C/C++ is a fixed-size sequential collection of elements of the same data type where all the elements are stored in the contiguous memory allocation. If an array is accessed out of bounds then an undefined behavior will occur in C/C++, unlike Java where an exception such as java.lang.ArrayIndexOutOfBoundsException will occur. Accessing Out of Bound Memory Accessing out-of-bounds memory in an array means we are trying to access the array index outside its valid range size (i.e., index = array size). It returns any garbage value in the output. Example In ... Read More

To write long strings in multi-lines, you can use 'newline character' or 'raw string literal'. It increases the readability of the code, makes the code look clean, and you can avoid scrolling. In this article, we have a long string and our task is to write the long string in multi-lines in C++. Approaches to Write Long Strings in Multi Lines Here is a list of approaches to write long strings in multiple lines which we will be discussing in this article with stepwise explanation and complete example codes. Using Newline Character ... Read More

An array can be created using all data types such as int, char, float, double etc. But creating an array by using the void data type is not possible. An error will be displayed if that is done.A program that demonstrates this is given as follows.Example Live Demo#include #include int main() {    void arr1[4];    printf("A void array");    return 0; }OutputThe above program returns the following error.error: declaration of ‘arr1’ as array of voids void arr1[4];Now let us understand the above program.An array arr1 of void data type is created in the above program. Since this is ... Read More