C語言打印矩形、長方形、平行四邊形、各類三角形

矩形：code #define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> int main() { int i, j, n; printf("請輸入要打印矩形的行數："); scanf("%d", &n); for (i = 1; i <= n; i++) { for (j = 1; j <= n; j+

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