i tried converting integer into string using sprintf , but its giving me an error

Question

here is my source code :

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>

int i,a,b,c;

char d[12];
char e[12];

int main(int argc, char const *argv[])
{
for (i = 0; i < 1000 ; i++)
{

if (i<9)
{
printf("\n");
}

if (i > 10 && i>=99)
{
sprintf (i,"%d",d);

b = d[0]*d[0]*d[0] + d[1]*d[1]*d[1];

if (b==i)
{
printf("%d",i);
}

}

else
{
sprintf (i,"%d",d);

b = d[0]*d[0]*d[0] + d[1]*d[1]*d[1] + d[2]*d[2]*d[2];

if (b==i)
{
printf("%d",i);
}
}
}
return 0;
}

Answer 1

You're using sprintf() incorrectly:
int sprintf ( char * str, const char * format, ... );
note the 1st parameter is a char pointer and you are passing an int.

http://www.cplusplus.com/reference/cstdio/sprintf/
https://en.wikibooks.org/wiki/C%2B%2B_Programming/Code/Standard_C_Library/Functions/sprintf

You're also trying to use d and b before they are initialized.
if (b==i) b has not been set here

Answer 2

First : stdafx.h might not work on SoloLearn
Second : If you can avoid using global variables, avoid ! You should declare your variables in the scope of the function that use them (here, in main)
Third : switch i and d in all your sprintf calls
Fourth : '0' > 0, if you want to get a figure from char to int, you need to do something like d[0] - '0'
Fifth : you do not use stdlib.h functions and macros
Sixth : you should remove c++ tag as it is clearly C

I hope I helped you :)
If you have any other question, please ask, I would be glad to answer !

PS :
Points 2, 5 and 6 are more like something you should change than real errors.
Point 4 is a logical error, not a syntax error.
Point 1 might be useless if you compile this program on your computer and have this header file in the same directory, but I do not see functions that could be in it so it looks like it is useless