2022年经典c程序100例==31--40(1).docx

2022年经典c程序100例=31-40(1)class=news style="WORD-WRAP: break-word">题目：请输入星期几的第一个字母来推断一下是星期几，假如第一个字母一样，则接着推断其次个字母。1.程序分析：用状况语句比较好，假如第一个字母一样，则推断用状况语句或if语句推断其次个字母。2.程序源代码：#include <stdio.h>void main(){char letter;printf("please input the first letter of someday");while (letter=getch()!='Y')/*当所按字母为Y时才结束*/{ switch (letter){case 'S':printf("please input second letter");if(letter=getch()='a')printf("saturday");else if (letter=getch()='u')printf("sunday");else printf("data error");break;case 'F':printf("friday");break;case 'M':printf("monday");break;case 'T':printf("please input second letter");if(letter=getch()='u')printf("tuesday");else if (letter=getch()='h')printf("thursday");else printf("data error");break;case 'W':printf("wednesday");break;default: printf("data error");}}}=题目：Press any key to change color, do you want to try it. Please hurry up!1.程序分析：2.程序源代码：#include <conio.h>void main(void){int color;for (color = 0; color < 8; color+){textbackground(color);/*设置文本的背景颜色*/cprintf("This is color %d", color);cprintf("Press any key to continue");getch();/*输入字符看不见*/}}=题目：学习gotoxy()与clrscr()函数1.程序分析：2.程序源代码：#include <conio.h>void main(void){clrscr();/*清屏函数*/textbackground(2);gotoxy(1, 5);/*定位函数*/cprintf("Output at row 5 column 1");textbackground(3);gotoxy(20, 10);cprintf("Output at row 10 column 20");}=题目：练习函数调用1. 程序分析：2.程序源代码：#include <stdio.h>void hello_world(void){printf("Hello, world!");}void three_hellos(void){int counter;for (counter = 1; counter <= 3; counter+)hello_world();/*调用此函数*/}void main(void){three_hellos();/*调用此函数*/