Starting...

 Those who tell you that learning a language or programming skill  or web development or any field of computer science  is  like a piece  of  cake or an overnight process, are  those idiots who  walk into  glass doors .  So assume it  that you would have to work hard and  give  max of   your time . Just changing your status   and wallpapers won't make you a star . It requires tremendous hard work and  passion to achieve your goals.

First of all you should know all the  basics  of  a programming  language and have a good practice in topics like handling  a loop , checking a condition , working with strings,pointers , matrices,functions etc.

Pick up any competitive coding site . There are many such  sites like Codeforces , a2oj , Uva ,Codechef, Hackerearth , Hackerrank, Spoj , Projecteuler etc.  I would suggest you to use Codeforces/Codchef/Hackerrank  as the questions  present there are conceptual and help you to enhance your coding skills .

Till now i have good practice in C , C++  and currently  learning Java .
Start from the Beginner level . Attempt those questions  first which  have maximum submissions.
Initially you would find it difficult to solve them . There are certain approach and certain tools  for meeting the required constraints of  problems . ......

1.) Taking an Input :

suppose you  have to check 'T' test   cases .
your code should start like this ..
int main()
{
   int t;
   scanf("%d",&t);
   while(t--)
   {
    // your code goes here .........
     ........
     ........
     output the result for each test case here like..
     printf("%d\n",answer);
   }
}