如何用C语言画帕斯卡三角形？

Question

我正在尝试编写打印以下内容的代码：

这是我尝试过的：

#include <stdio.h>

int main() {
    int i, j, rows;

    printf("Enter number of rows: ");
    scanf("%d", &rows);

    for (i = rows; i >= 0; i--) {

        for (j = 1; j <= i; ++j) {
            printf("* ");
        }

        printf("\n");
    }

    return 0;
}

我该怎么做呢 ？

Answer 1

这是一个简单的例子：

#include <stdio.h>

int main() {
    int rows, i, j, w;

    printf("Enter number of rows: ");
    if (scanf("%d", &rows) != 1)   // get the number of rows, exit if input error
        return 1;

    int coeff[rows + 1];           // array to store the binomial coefficients
    for (i = 0; i < rows; i++) {
        coeff[i] = 1;              // initialize the last coefficient to 1
        for (j = i - 1; j > 0; j--) {
            coeff[j] += coeff[j - 1];  // add adjacent coefficients to get the new value
        }
        w = (rows - i) * 3;        // output 3 extra leading spaces for each row from the end
        for (j = 0; j <= i; j++) { // output i+1 coefficients
            printf(" %*d", w, coeff[j]);
            w = 5;                 // output more coefficients on 1+5 characters
        }
        printf("\n");
    }
    return 0;
}

输出：

输入行数：6
                  1
               1 1
            1 2 1
         1 3 3 1
      1 4 6 4 1
   1 5 10 10 5 1