warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘time

Linux编程出错:
今天写时间编程,测试一个小程序

编译的时候却报错

错误分析:%d需要另一个类型的整数,应该是长整型或无符号
粘贴错误指令搜索,发现了解决办法☞
%md，m为指定的输出字段的宽度。如果数据的位数小于m，则左端补以空格，若大于m，则按实际位数输出。

%ld(%mld 也可)，输出长整型数据。
u格式符，用来输出unsigned型数据，无符号数，以十进制数形式输出。格式：%u，%mu,%lu都可
解决

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warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘time_t {aka long int}

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