As we saw earlier, an entity that may vary during program execution is called a variable. Variable names are names given to locations in memory. These locations can contain integer, real or character constants. In any language, the types of variables that it can support depend on the types of… Continue reading
A character constant is a single alphabet, a single digit or a single special symbol enclosed within single inverted commas. Both the inverted commas should point to the left. For example, ’A’ is a valid character constant whereas ‘A’ is not. The maximum length of a character constant can be… Continue reading
Real constants are often called Floating Point constants. The real constants could be written in two forms—Fractional form and Exponential form. Following rules must be observed while constructing real constants expressed in fractional form: A real constant must have at least one digit. It must have a decimal point. It… Continue reading
An integer constant must have at least one digit. It must not have a decimal point. It can be either positive or negative. If no sign precedes an integer constant it is assumed to be positive. No commas or blanks are allowed within an integer constant. The allowable range for… Continue reading
In C Language constants can be divided into two major categories: Primary Constants Secondary Constants These constants are further categorized as shown in Figure.
C is a programming language developed at AT & T’s Bell Laboratories of USA in 1972. It was designed and written by a man named Dennis Ritchie. In the late seventies C began to replace the more familiar languages of that time like PL/I, ALGOL, etc. No one pushed C…. Continue reading
Q: – Write a program to reverse a string with out using any array? #include<stdio.h> int main() { char *str=”Mahesh”; char *ptr=str+strlen(str); while(ptr>=str) { printf(“%c”,*ptr); ptr–; } } Q: – How do you find IP adress of ur system? ipconfig – in windows cmd mode. ifconfig -a in linux and… Continue reading
Q: – Explain “method”? A Method is a programmed procedure. It is defined as part of a class also included in any object of that class. Class can have more than one methods. It can be re-used in multiple objects. Q: – What is the output of the bellow program?… Continue reading
Q: – How do you remove a macro name? By using the #undef directive with a macro name, that macro name can be removed, or “undefined.” Q: – Why do you need the #endif directive? The #endif directive is used with an #if, #ifdef, or #ifndef directives because statements under… Continue reading
Q: – Why do we need function prototypes? With the help of a function prototype, the compiler can automatically perform type checking on the definition of the function, which saves you time in debugging the program. Q: – Can a function return a pointer? Yes Q: – Why do you… Continue reading