2. 编程实现:输入1个不多于四位的正整数,①求出它是几位数;②分别打印...答:include <stdio.h> main(){int m,qw,bw,sw,gw;printf("INput a m<9999\n");scanf("%d",&m);if(m>0&&m<10)printf("m 是一位数,为%d",m);else if(m>10&&m<100)printf("m是二位数,十位sw=%d,个位gw=%d",m/10,m%10);else if(m>100&&m<1000)printf("m是三位数,...