c语言编程 输入m,n,求m,n之间的阶乘和m!+(m+1)!+...+n! 要先判断m,n...答:printf(" input :m\n" );scanf("%d", &m);getchar();printf(" input :n\n" );scanf("%d", &n);getchar();if( m <= 0 || n <= 0 ){ printf(" error, m = %d, n = %d", m, n );return -1;} if( m > n ){ // exchage; // 交换 m 为最小的.m=m...