Codeblocks Build error

Question

I'm using Codeblocks 13.12 with MinGW on Winodows 10. I'm somewhat familiar with C, but haven't been coding for some while. Last time I wrote a code was with Turbo compiler. So I'm starting to code once again and this the first time I'm using GCC. So I thought of starting with a simple code to print the pattern:Pattern to print

The code I wrote is:

#include<stdio.h>

using namespace std;
int main()
{
    int i=0,j=0,k=0;
    for(i;i<=4;++i)
    {
        j=2*i+1;
        for(k=1;k<=j;++k)
            printf(k);
    }
    return 0;
}

The error I get is:Error on build attempt

Tell me, is it because of some error in my code(not logical), or there's something else.

Answer 1

first of all there is no space after the include. EDIT: Tried it, and it works with no space, but it's better for further reading

second, using namespace is not C, it is C++,

third, the printf function has to look like this: printf("%i",k); there has to be placeholders for each variable you want to print. please see some turorial and don't mix C and C++. If you want to program in C++ use something like cout >> instead of printf and use the C++-Headers, #include <stdio>

That works and is good to read ;-):

#include <stdio.h>

int main()
{
    int i=0,j=0,k=0;
    for(i;i<=4;++i)
    {
        j=2*i+1;
        for(k=1;k<=j;++k)
            printf("%i\n",k);
    }
    return 0;
}