输出菱形和三角形

1.
#include<stdio.h>
#include<stdlib.h>
int main ()
{
    int i=0;
    int j=0;
    int k=0;
    int l=0;
    char arr1[] = "      *      ";
    char arr2[] = "*************" ;
    int right = 14;
    int left = 1;
    int mid=0;
    mid = right/2 ;
    for(i=0;i<7;i++)
        {
    arr1[mid-i] = arr2[mid-i];
    arr1[mid+i] = arr2[mid+i];
    for(j=0;j<7;j++);
        printf("%s\n",arr1);
    }
    for(k=0;k<6;k++)
        {
    char arr3[] = "      *      ";


            right--;
            left++;

    arr1[right] = arr3[right];
    arr1[left] = arr3[left];
    for(l=0;l<6;l++);
        printf("%s\n",arr1);
    }

    system("pause");
    return 0 ;
    
        }
2.
#include<stdio.h>
#include<stdlib.h>
    int main()
    {
        int i = 0;
        int j = 0;
        int k = 0;
        int l = 0;
        
    for(i=0;i<=999;i++)
    {
        int j = i%1000/100;
        int k = i%100/10;
        int l = i%10;
        if( j*j*j+k*k*k+l*l*l==i
            
            )
            printf("%d\n",i);

    }
    system ("pause");
    return 0 ;



    }


3.
#include<stdio.h>
#include<stdlib.h>
    int main()
    {int i = 0;
     int n = 0;
     int a = 0;
     int sum = 0;
     int add = 0;
     scanf("%d %d",&n,&a);
        for(i=0;i<n;i++)
        {
            add=add*10+a;
            sum+=add;
        }
    printf("%d",sum);
    system("pause");
    return 0 ;

    }