Question

我是C语言的新手。请帮帮我。我正在编写一个程序，它接受十进制数并遍历它们以找到数字之和。

例如，233.1234是输入 sum = 18是输出

谢谢

到目前为止我的代码

void main()
{
    float num;
    printf("Enter the decimal number : ");
    scanf("%d",&num);
    printf("%10.10d",num);
}

打印0000000000 谁能告诉我怎么打印？谢谢

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main(){
    double num;
    char input[32], *p;
    printf("Enter the decimal number : ");
    fgets(input, sizeof input, stdin);
    num = strtod(input, &p);
    if(*p=='\n'){
        int n, sum = 0;
        printf("input : %s", input);
        for(p = input; *p ; ++p){
            if(1==sscanf(p, "%1d", &n))
                sum += n;
        }
        printf("sum = %d\n", sum);
    } else {
        printf("Invalid input!\n");
    }
    return 0;
}

Answer 2

Following is the program

    #include<stdio.h>
    main()
    {

      //float f = 233.1234;
      float f;
      float s;
      int x;
      int unit = 0;

      printf("Enter the decimal number \n");
      scanf("%f",&f);

      printf("Entered the decimal number =%f\n",f);

      s = f;

       while((int)s % 10) {
         s = s*10;
       }
       x = (int) s/10;

       printf("x=%d,s=%f \n",x,s);

       while(x % 10) {
         unit = unit + (x % 10);
         x = x / 10;
       }

       printf("Sum of the digit = %d \n",unit);


    }



// output in the terminal

Enter the decimal number 
233.1234
Entered the decimal number =233.123398
x=2331234,s=23312340.000000 
Sum of the digit = 18

打印十进制数

2 个答案: