需要用数字和星星之间的空格来建立一个金字塔

Question

1 
    ** 
2  3 
***  **** 

金字塔应该看起来像这样使用指定的行数。我应该使用for循环。不过，我真的很困惑如何在数字和星星之间添加适当的空间。此外，如何获取每行显示的正确数字，以及使用什么条件来停止适当数量的数字。这是我到目前为止：

{ 

int userinput, rows, space, stspace, stars, num; 

//int startingnum; 

int i; 

printf("Enter the number of rows: "); 

scanf("%d",&userinput); 

printf("\n"); 

    for(rows=1; rows<=userinput; rows++) 
    //printf("\n"); 
     { 
      printf("\n"); 
      //for(i=1; i <= rows; i++) 
      //{ 
      //startingnum += i; 
      //} 

       if(rows%2!=0) 
        { 
        for(space=1; space<=(userinput)/(rows+1); space++) 
        printf("-"); 
        { 
         for(num=1; num<=rows; num++) 
         printf("%d",num); 
        } 
        } 
       else 
        { 
        for(stspace=1; stspace<=(userinput)*(rows); stspace++) 
        printf("-"); 
         { 
         for(stars=num+1; stars<=num+rows+1;stars++) 
          printf("*"); 
         } 

        } 
     } 
} 

任何帮助非常感谢！

Answer 1

这样

#include <stdio.h> 
#include <string.h> 

int main(void){ 
    int rows; 

    printf("Enter the number of rows: ");fflush(stdout); 
    scanf("%d", &rows); 
    printf("\n"); 
#if 0 
Draw the following when rows is 2 
[ ] represents one element. [] is for easy understanding for a element 

[ ][ 1 ] 
[ ][ ** ] 
[ 2 ][ ][ 3 ] 
[*** ][ ][****] 
#endif 
    int last_number = rows * (rows + 1)/2; 
    int element_width = last_number + 1; 

    char blank_element[element_width +1];//+1 for NUL 
    char stars_element[element_width +1]; 
    char work_element[element_width +1]; 
    char str_num[element_width +1]; 
    void repeatStringOutput(const char *str, int times); 

    //make blank element 
    memset(blank_element, ' ', element_width); 
    blank_element[element_width] = 0; 
    //initialize stars element 
    strcpy(stars_element, "*"); 

    int num = 1; 
    for(int r = 1; r <= rows; ++r){ 
     //print pre-blank-element 
     repeatStringOutput(blank_element, rows - r); 
     for(int c = 0; c < r; ++c){ 
      int len = sprintf(str_num, "%d", num + c); 
      if(c)//print blank element between stars element 
       fputs(blank_element, stdout); 
      strcpy(work_element, blank_element);//fill spaces 
      memcpy(work_element + (element_width - len)/2, str_num, len);//centering 
      fputs(work_element, stdout); 
     } 
     puts(""); 
     repeatStringOutput(blank_element, rows - r); 
     for(int c = 0; c < r; ++c){ 
      strcpy(stars_element + num++, "*"); 
      if(c) 
       fputs(blank_element, stdout); 
      strcpy(work_element, blank_element); 
      memcpy(work_element + (element_width - num)/2, stars_element, num); 
      fputs(work_element, stdout); 
     } 
     puts(""); 
    } 
} 

void repeatStringOutput(const char *str, int times){ 
    while(times--) 
     fputs(str, stdout); 
}