1、家庭财务理财系统

2、求在tt串中，‘a’到‘z’字母各出现几次，并由pp数组传回主函数。

3、不用是starct函数，实现两字符串连接。

4、焰火程序。

5、从3个红球，5个白球，6个黑球中任意取出8个作为一组，进行输出。在每组中可以没有黑球，但必须要有红球和白球。组合数作为函数值返回。正确组合数15，i，j，k分别代表红球，白球，黑球数。-1, family financial management system 2, and in the tt string, ' a'　to ' z'　letters several times each by pp the main function returns an array. 3, are not starct function, realize the string connecting the two. 4, fireworks procedures. 5, from 3 red balls, 5 white ball, black ball six out of eight arbitrarily as a group to carry out the output. In each group can be no black balls, but must have a red ball and white ball. Number of combinations as a function return value. The correct combination of number of 15, i, j, k representing the red ball, white ball, black ball a few.