C语言问题，急需答案。多谢！！！

#include void main() { char ch; int m,i,j; while(1) { do { printf("input a char\n"); scanf("%c",&ch); }while(ch 'Z'); if(ch=='0')break; } m = ch -'A'; for(i=0;i<=m;i++) { for(j=0;j&