我要输入三个输入，但它只允许我输入两个第一个并在第三个中断

Question

这个程序确定房间的面积，它是长度和宽度的乘积。房间是“太小”、“刚刚好”还是“太大”。如果房间“太小”或“太大”，可用空间与所需空间的差值，应为正数。

#include<stdio.h>

void main() {
    // Declare variables and set initial values
    int length, width, n, area, square;
    
    // Print new values
    printf("\nEnter room length:");
    scanf("%d", length);
    printf("\nEnter room width:");
    scanf("%d", width);
    printf("\nEnter number of students:");
    scanf("%d", n);
 
    // assigning area
    area = length * width;
     
    printf("\nArea is %d\n", area); 
    square = area - n * 10; 
    if (area > n*10) {
        printf("Room is too large by %d square feet", square);
    }
    else if (area < n*10) {
        printf("Room is too small by %d square feet", square);
    }
    else {
        printf("Room size is just right");
    }
}

Answer 1

#include<stdio.h>

int main() {
    // Declare variables and set initial values
    int length, width, n, area, square;
    
    // Print new values
    printf("\nEnter room length:");
    scanf("%d", &length);
    printf("\nEnter room width:");
    scanf("%d", &width);
    printf("\nEnter number of students:");
    scanf("%d", &n);
 
    // assigning area
    area = length * width;
     
    printf("\nArea is %d\n", area); 
    square = area - n * 10; 
    if (area > n*10) {
        printf("Room is too large by %d square feet", square);
    }
    else if (area < n*10) {
        printf("Room is too small by %d square feet", square);
    }
    else {
        printf("Room size is just right");
    }
    
    return 0;
}`

& 运算符需要在 scanf 中的变量之前将值存储在该变量中

例如scanf(%d,&b)

Answer 2

在格式说明符%d 之后和变量之前使用& 作为& 运算符用于获取变量的地址或接受用户输入，在任何使用scanf 的地方，除了字符数组或字符串.使用gets(variable_name) 函数将字符数组或字符串作为用户的输入。例如，如果我接受你的程序，它应该是：

 printf("\nEnter room length:");
scanf("%d",&length);
printf("\nEnter room width:");
scanf("%d",&width);
printf("\nEnter number of students:");
scanf("%d",&n);

printf("\n enter name : "); //datatype of Name must be String
gets(name);