c语言奔跑的小人，是从左往右走的 现在要它从右面往左走，怎么修改？ #include<stdio.

c语言奔跑的小人，是从左往右走的 现在要它从右面往左走，怎么修改？ #include<stdio.

把初始值a = 20; while循环改成a >= 0 最后的a ++ 改成a --就好了
#include
#include
#include
int main() {
        int a,b;     a=20;//---------------------
        while (a >= 0)     { //-------------------------
                        system("clear");
            b=1;
            while (b<=a)         {
                printf(" ");
                b++;
                }
                printf(" O
");
                b=1;
                while (b<=a)         {
                    printf(" ");
                    b++;
                }
                    printf("
");
                    b=1;
                    while (b<=a)         {
                        printf(" ");
                        b++;
                    }
                    printf("I I
");
                    sleep(1);
                    a--; //--------------------------------------
                }
             }