下面程序段运行时从键盘上输入:2473↙,其输出结果是()。#includeint main(){ int c; while ((c=getchar())!=”) switch (c-‘2’) { case 0: case 1: putchar(c+4); case 2: putchar(c+4); break ; case 3: putchar(c+3); default: putchar(c+
单选题
下面程序段运行时从键盘上输入:2473↙,其输出结果是()。#includeint main(){ int c; while ((c=getchar())!=”) switch (c-‘2’) { case 0: case 1: putchar(c+4); case 2: putchar(c+4); break ; case 3: putchar(c+3); default: putchar(c+