编辑代码

//格式声明 = %格式附加字符  格式字符
#include<stdio.h>
int main()
{
    printf("%5d\n",-12);
    printf("%5c\n",'a');
    printf("%5sW\n\n","abcd");

    printf("%-5dA\n\n",-12);
    printf("%7.2lf\n",12.345);
    printf("%7.0lf\n",12.345);  //%7.lf和%7.0lf是等价的
    printf("%.5lf\n",12.345);
    printf("%11lf\n",12.345);
    printf("%-11lf\n",12.345);
    return 0;
}