初學C語言【1】九九乘法口訣表

`在這裏插入代碼片`#include<stdio.h> #include<stdlib.h> #include<windows.h> int main() { system("color 73"); int a, b, c, d; d = 0; a = 0; while (a < 9) { b = 1; a = a + 1; while (b <= a) { printf("%d*%d=%-2d ", b, a, d = a * b); b = b + 1; } Sleep (1000); printf(" \n"); } } 【while】 #include<stdio.h> #include<stdlib.h> int main() { system("color 73"); int i, j, k; k = 0; for (i = 1; i <= 9; i++) { for (j = 1; j <= i; j++) printf("%d*%d=%-2d ", j, i, k = j * i); printf(" \n"); } } 【for】