View Code of Problem 53

#include <stdio.h>
#include <math.h>
int main(){
   int n;
   while(scanf("%d",&n)!=EOF){
        //上部
   for(int i=0;i<n;i++){
    //打印空格
    for(int j=1;j<=n-i;j++){
        printf(" ");
    }
    //打印*
    for(int k=0;k<2*i+1;k++){
        printf("*");
    }
    printf("\n");
   }
   //下部
   for(int i=n-2;i>=0;i--){
    //空格
    for(int j=1;j<=n-i;j++){
        printf(" ");
    }
    //打印*
    for(int k=0;k<2*i+1;k++){
        printf("*");
    }
    printf("\n");
   }

   return 0;
   }
}

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