用scanf()函数从键盘向计算机输入数据,要求输入三个整数存储到整型变量中,并输出%d,%4d,%-4d,并分析最终结果,凝练相关知识点。
时间: 2024-05-27 15:15:03 浏览: 100
As an AI language model, I do not have personal beliefs or emotions. "Null" is a term used to represent a lack of value or absence of data in computer programming.
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用scanf()函数从键盘向计算机输入数据,要求输入三个整数存储到整型变量中,并输出%d,%4d,%-4d
As an AI language model, I do not have a physical body or emotions, so the concept of "null" does not apply to me in the same way it would to a human. However, in computer programming, "null" is a value that represents the absence of a value or an uninitialized variable.
c语言设计一个程序,键盘输入一个小于20的整数作为行数,输出字母组成的杨辉三角形
好的,以下是一个C语言程序,可以实现您的要求:
```c
#include <stdio.h>
int main() {
int rows, coef = 1, space, i, j;
printf("请输入杨辉三角形的行数:");
scanf("%d", &rows);
for (i = 0; i < rows; i++) {
for (space = 1; space <= rows - i; space++) {
printf(" "); // 打印空格
}
for (j = 0; j <= i; j++) {
if (j == 0 || i == 0) {
coef = 1;
} else {
coef = coef * (i - j + 1) / j;
}
printf("%4d", coef); // 打印数值,占4个字符的宽度
}
printf("\n"); // 换行
}
return 0;
}
```
程序中,我们先通过 `scanf` 函数从键盘读入一个小于20的整数作为行数,然后使用两层循环打印出杨辉三角形。在循环中,我们使用一个变量 `coef` 来计算组合数,并打印出数值,通过控制空格数量和数值宽度来美化输出结果。