Program to print out numbers separated by stars with the occurrence defined by the number printed.

This will print out something like this
1
2*2
3*3*3
4*4*4*4
and then the reverse image.
If you have any doubt, please do ask.

#include<stdio.h>
main()
{
int i=1,j=2,z=4,k;
printf("%d\n",i);
for(k=0;k<3;k++)
{
for(i=2;i<z-1;i++)
{
printf("%d*",j);
}
printf("%d\n");
j++;
z++;
}
j=4;
for(k=0;k<3;k++)
{
for(i=2;i<z-2;i++)
{
printf("%d*",j);
}
printf("%d\n");
j--;
z--;
}
printf("%d",1);
}

String reversal without string.h

This is a program to reverse a string without the string.h header. If you have any doubts, please do ask.

#include<stdio.h>
main()
{
int i,count=0,j=0;
char string[10],final[10];
scanf("%s",string);
for(i=0;string[i]!='\0';i++)
count++;
count--;
for(i=count;i>=0;i--)
{
final[j]=string[i];
j++;
}
final[j]='\0';
printf("%s",final);
}