Making my code better?

[mas0]

I am required to make a few programs for school. Very simple ones. Any way i could improve that?

#include <stdlib.h>

int main()
{

     int i;
     for (i = 1; i<=10;++i)
     {
         printf("Number : %d - Square : %d \n",i, i*i);
     };


     system("PAUSE");
      return 0;
}

#include <stdlib.h>

int main()
{

     int i;
     for (i = 10; i<=45;++i)
     {
         printf("Number : %d - Square : %d \n",i, i*i);
     };


     system("PAUSE");
      return 0;
}

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

int main()
{
    char *name;
    int counter;
    counter =0;

    printf("Enter name ");
    scanf("%s", name);

    while (strcmp(name,"STOP") != 0)
    {
          counter++;
          printf("Name : %s \n",name);
          printf("\nEnter name ");
          scanf("%s", name);

    }

    printf("\nNumber of names entered : %d",counter);

    system("PAUSE");
    return 0;
}

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

int main()
{
    int number,total,highest;
    total=0;

    printf("Enter number (-ve to stop) ");
    scanf("%d", &number);
    highest = number;

    while (number >=  0)
    {
          if (number > highest)
          {
           highest = number;
          }

          total+=number;
          printf("Enter number (-ve to stop) ");
          scanf("%d", &number);

    }

    printf("\nTotal : %d",total);
    printf("\nHighest number : %d\n",highest);

    system("PAUSE");
    return 0;
}

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

int main()
{
    int number,total,highest;


    printf("Enter number (-ve to stop) ");
    scanf("%d", &number);
    highest = number;
    total=0;

    if (number >=0)
    {
       do
       {
               total+=number;
               printf("Enter number (-ve to stop) ");
               scanf("%d", &number);
               if (number > highest)
                  highest = number;

        } while (number >=  0)
    }

    printf("\nTotal : %d",total);
    printf("\nHighest number : %d\n",highest);

    system("PAUSE");
    return 0;
}

[Prelude]

>scanf("%s", name);
This will fail. name probably doesn't point to memory that you own, and if it does, it's not likely to be where you want a string written.

Other than that, at a glance your code seems okay for simple school stuff. You could work on your formatting as it's not very consistent, and bulletproofing can wait until later. Anything else would just be nitpicking.

[ssharish2005]

system("PAUSE");

not a good idea

getchar();

ssharish2005