printf("char(%c) = %c,A = %c\n",ch,ch,

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printf(

printf("char(%c) = %c,A = %c\n",ch,ch,
printf("char(%c) = %c,A = %c\n",ch,ch,

printf("char(%c) = %c,A = %c\n",ch,ch,
双引号里面的内容就是你要输出的内容,遇到格式符就根据格式将后面形参表的参数依次输出,比如这题,结果就应该是：char(/*字符ch*/) = /*字符ch*/,A = A