100 cases of classical C language programming

"Program 1" title: There are 1, 2, 3, 4 digits, how many can be composed of different and no repetition of the number of three digits? How much are they?

"Program 2" title: Bonuses awarded by the enterprise according to the profit commission. Profit (I) less than or equal to $100,000, the bonus can be raised by 10%, the profit is higher than $100,000, less than $200,000, the portion of less than 100,000 yuan by 10% commission, higher than the portion of 100,000 yuan, a commission of 7.5%, 200,000 to 400,000, higher than 200,000 yuan, can commission 5% ; Between 400,000 and 600,000 is higher than the portion of 400,000 yuan, can commission 3%, 600,000 to 1 million, higher than 600,000 yuan portion, can commission 1.5%, higher than 1 million yuan, the portion of more than 1 million yuan by 1% Commission, from the keyboard input month profit I, the total bonus should be issued?

"Program 3" title: An integer, which plus 100 is a complete square number, plus 168 is a complete square number, what is the number?

"Program 4" title: Enter a certain day of the year, Judge this day is the first of the year?

"Program 5" title: Enter three integers x, y, Z, please put these three numbers from small to large output.

"Program 6" title: Use the * number to output the letter C pattern.

100 cases of classical C language programming