C++打印三角形、四边形
C++打印三角形、四边形
用“*“字符组成几种三角形、四边形
1、打印等腰三角形
法一:
//打印正三角形
#include <iostream>
using namespace std;
int main()
{
int n = 4; //行数
for (int i = 1; i <= n; i++) {
for (int k = 0; k < n - i; k++) {
cout << " ";
}
for (int j = 0; j < 2 * i - 1; j++) {
cout << "*";
}
cout << endl;
}
return 0;
}
法二
//打印三角形——简单
#include <iostream>
using namespace std;
int main()
{
cout << " *" << endl;
cout << " ***" << endl;
cout << " *****" << endl;
cout << "*******"<< endl;
return 0;
}
2、打印倒等腰三角形
法一
//打印倒三角形
#include <iostream>
using namespace std;
int main()
{
int n = 4; //行数
for (int i = n; i > 0; i--) {
for (int k = 0; k < n - i; k++) {
cout << " ";
}
for (int j = 0; j < 2 * i - 1; j++) {
cout << "*";
}
cout << endl;
}
return 0;
}
法二
//打印倒三角形——简单
#include <iostream>
using namespace std;
int main()
{
cout << "*******"<< endl;
cout << " *****" << endl;
cout << " ***" << endl;
cout << " *" << endl;
return 0;
}
3、打印直角三角形
#include <iostream>
using namespace std;
int main(){
int n,i,j;
n = 4; //行数
for(i = 1;i <= n;i++){
for(j = 1;j <= i;j ++){
cout << "*";
}
cout << endl;
}
return 0;
}
4、打印倒直角三角形
#include <iostream>
using namespace std;
int main(){
int n,i,j;
n = 4; //行数
for(i = 1;i <= n;i++){
for(j = n;j >= i;j --){
cout << "*";
}
cout << endl;
}
return 0;
}
5、打印矩形
#include <iostream>
using namespace std;
int main(){
int n,i,j;
n = 4; //行数
for(i = 1;i <= n;i++){
for(j = 1;j <= n;j ++){
cout << "*";
}
cout << endl;
}
return 0;
}
6、打印平行四边形
#include <iostream>
using namespace std;
int main(){
int n,i,j;
n = 4; //行数
for(i = 1;i <= n;i++){
for(j = 1;j <= i - 1;j ++){
cout << " ";
}
for(j = 1;j <= n;j++){
cout << "*";
}
cout << endl;
}
return 0;
}
7、打印菱形
法一
#include<iostream>
using namespace std;
int main()
{
int n = 4; //输入菱形的边长
//上半层
for (int i = 0; i < n; i++)
{
for (int j = 0; j < (n - 1) - i; j++)
{
cout << " ";
}
for (int j = 0; j < (2 * i + 1); j++)
{
cout << "*";
}
cout << endl;
}
//下半层
for (int i = 0; i < n - 1; i++)
{
for (int j = 0; j < i + 1; j++)
{
cout << " ";
}
for (int j = 0; j < 2 * ( n - 1 ) - (1 + 2 * i); j++)
{
cout << "*";
}
cout << endl;
}
return 0;
}
法二
#include <iostream>
#include <stdlib.h> //abs()用到
using namespace std;
int M = 4; //菱形边长字符数
int f(int x, int y) {
return abs(x) + abs(y) < M;
}
int main() {
for (int y = 1 - M; y < M; ++y) {
for (int x = 1 - M; x < M; ++x) {
cout << " *"[f(x, y)];
}
cout << endl;
}
return 0;
}
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