Description:
By using two-dimensional array, write C program to display a table that represents a Pascal triangle of any size. In Pascal triangle, the first and the second rows are set to 1. Each element of the triangle (from the third row downward) is the sum of the element directly above it and the element to the left of the element directly above it. See the example Pascal triangle(size=5) below:
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
#include<stdio.h>
int a[101][101] = {0};
// 先初始化数组全为0
void printPascalTr(int size) {
printf("1\t\n");
// 先打印第一行的1,不然会少一行超惨
a[1][1] = 1;
// 初始已知第一行第一列是1
int i, j;
// 下面用两个for循环打表,外层控制行,内层控制列
for (i = 2; i <= size; i++) {
for (j = 1; j <= i; j++) {
a[i][j] = a[i - 1][j] + a[i - 1][j - 1];
// 这个数是它左上方和头顶的和
printf("%d\t", a[i][j]);
}
printf("\n");
// 注意一行打完之后换行
}
}
int main() {
int size;
printf("Enter Pascal triangle size:");
scanf("%d", &size);
printPascalTr(size);
getchar();
return 0;
}
C语言帕斯卡三角形
本文介绍了一个使用C语言实现的帕斯卡三角形程序。通过二维数组的方法,可以生成任意大小的帕斯卡三角形。代码首先初始化数组,然后通过两层循环计算并打印每个元素。
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