Fundamentals of Programming

Fundamentals of C and C++:

Every Programming Languages have some basic rules that should be followed to become a good programmer. Some of them are as follows.

Rules for Declaring Variable Names:

1. Variable name can be any combination of 1 to 31 alphabets, digits or underscore.
2. The first character of variable name should be an alphabet.
3. Commas, blanks or any other special symbols are not allowed in variable name.

 

C/C++ Keywords:

int    double    auto    char    if    else    long    switch    case    enum    register    typedef    struct    extern    return    union    const    float    short    unsigned    continue    for    signed    void    default    goto    sizeof    volatile    do    break    static    while  new

Integer Float Conversions:

There are some Rules that should be kept in mind before using mathematic operations on different data types. They are as follows.

1.  An arithmetic operation between an integer and integer always result in integer.
2.  An arithmetic operation between a float and float always result in float.
3.  An arithmetic operation between an integer and float always result in float.

Priority:

In programming languages, every symbol has its own importance and precedence over one another. Some of them are as follows.

1.  *  /  %
2. +  –
3. =

* have highest precedence and then /,%,+,-,= these shold be kept in mind before using them in athematic operations.