打印一个菱形

#include <stdio.h>#include <math.h>int main(){    int i, j, k;    for (i = 1; i <= 9; i++) {        //通过5-i的绝对值，控制打印空格，432101234        for (j = 0; j <= abs(5 - i); j++)            printf(" ");        //通过2 * (5 - abs(5 - i) - 1)，控制打印星号，135797531        for (k = 0; k <= (2 * (5 - abs(5 - i) - 1)); k++)            printf("*");        printf("\n");    }    return 0;}