/*1. 输入一数字作为秒数,按小时,分钟,秒的格式输出。(00:3:0)*/ include int main(void){ long int x,hour,minute,second;printf("请输入一数为来作来秒数:\n");scanf("%d",&x);hour=x/3600;minute=(x%3600)/60;second=(x%3600)%60;printf("你所输入数字转换格式后为...