1.Hello,World!#includebits/stdc.h using namespace std; int main(){ cout Hello,World!; return 0; }2.打印⻜机#includebits/stdc.h using namespace std; int main(){ cout ** endl; cout ** endl; cout ************ endl; cout ************ endl; cout * * endl; cout * * endl; return 0; }3.第⼆个整数#includebits/stdc.h using namespace std; int main(){ int a,b,c; cin a b c; cout b; return 0; }4.字符三⻆形#include bits/stdc.h using namespace std; int main(){ char c; cin c; cout cendl; cout cccendl; coutccccc; return 0; }5.整数#include bits/stdc.h using namespace std; int main(){ char c; cin c; cout cendl; cout cccendl; coutccccc; return 0; }6.打印字符#include bits/stdc.h using namespace std; int main(){ int a; cina; char c (char)a; cout c; return 0; }7.倒序8.整型数据类型存储空间⼤⼩#include bits/stdc.h using namespace std; int main(){ int a,b,c; cin a b c; cout c b a; return 0; }9.买票#include bits/stdc.h using namespace std; int main(){ int x; cin x; cout 100*x; return 0; }10.A B 问题#includebits/stdc.h using namespace std; int main(){ int a,b;cin ab; cout ab; return 0; }11.鸡兔同笼#include bits/stdc.h using namespace std; int main(){ int head 35,foot 94; int rabbit (foot-2*head)/2; int chicken head-rabbit; cout rabbit chicken; return 0; } //也可直接写答案12.计算(ab)*c#includebits/stdc.h using namespace std; int main(){ int a,b,c; cin a b c; cout (ab)*c; return 0; }13.带余除法#include bits/stdc.h using namespace std; int main(){ int m,n; cin m n; int a m/n; int b m %n; cout a b; return 0; }14.整数个位#include bits/stdc.h using namespace std; int main(){ int a; cina; cout abs(a) % 10; return 0; }15.整数⼗位#includebits/stdc.h using namespace std; int main(){ int n; cin n; int c (n/10)%10; cout c; return 0; }16.时间转换#include bits/stdc.h using namespace std; int main(){ int s;cin s; int sx s % 60; int h s/3600; int m (s/60)%60; cout h m sx; return 0; }17.⼩⻥的游泳时间#includebits/stdc.h using namespace std; int main(){ int a,b,c,d; cin a b c d; int end c*60d; int start a*60b; int sum end-start; int f sum%60; int e sum/60; cout e f; return 0; }18.交换值#includebits/stdc.h using namespace std; int main(){ int a,b,t; cin a b; t a; a b; b t; cout a b; return 0; }19.计算成绩#includebits/stdc.h using namespace std; int main(){ int a,b,c;cin abc; int s (int)a*0.2b*0.3c*0.5; cout s; return 0; }20.浮点数向零舍⼊​ #includebits/stdc.h using namespace std; int main(){ double x; cin x; cout (long long)x; return 0; }//long long向零舍入 ​21.打印字符ASCII#includebits/stdc.h using namespace std; int main(){ char c;cin c; int a(int)c; cout a; return 0; }22.打印字符使⽤强制类型转换#include bits/stdc.h using namespace std; int main(){ int a; cina; char c (char)a; cout c; return 0; }