#include <stdio.h>
int main(int argc, char *argv[])
{
int space = 5;
int i = 1;
int count = 1;
int k;
int m;
for(k = 0; k < 5; k++) {
for( m =0; m < space; m++)
putchar(' ');
for(m=0; m < count; m++) {
printf("%d", i);
i = i == 9 ? 0 : i+1;
}
count += 2;
for( m =0; m < space; m++)
putchar(' ');
space--;
putchar('\n');
}
return 0;
}
for循环输入0123456789,在1 3 5 7时判断换行,倒9置0