如何使用C语言显示用户的5个输入数字的总和

Question

#include <stdio.h>
#include <conio.h>

main() {
    float num1, num2, num3, num4, num5, sum;

    printf("Enter a Number between");
    fflush;
    scanf("%f",&num1);
    fflush;

    printf("Enter a Number between");
    scanf("%f",&num2);
    fflush;

    printf("Enter a Number between");
    scanf("%f",&num3);
    fflush;

    printf("Enter a Number between");
    scanf("%f",&num4);
    fflush;

    printf("Enter a Number between");
    scanf("%f",&num5);
    fflush;

    sum = num1 + num2 + num3 + num4 + num5;
    printf("The sum of the five numbers you have entered is %f",sum);

    getch();
}

I am a newbie in c programming. We have an assignment and I have created the above code. But we need a shorter solution. The user must input five numbers and display the sum. Can you please help me to translate this code using do while function or post test loop. Thank you very much in advance!

Answer 1

You can use a cycle to read 5 values and accumulate their sum. I prefer to leave you with this hint only because this seems like a homework assignment. You may reuse the same variable reading 5 different inputs and have a separate variable in which you accumalate the sum. You can also use a for cycle instead of the do... while you seem to be using.

Answer 2

Use a for loop to input numbers (say 5 in this case) and add it with value stored in sum in each iteration.

     int num , sum = 0;  

     for(int i = 0; i < 5; i++)
     {
         scanf("%d", &num);  
         sum += num;
     }

Answer 3

When someone asks me to do their homework for them, I enjoy coming up with a slightly convoluted, but functionally correct answer. :)

#include <stdio.h>
#include <conio.h>

int main()
{
    float numbers[5] = {0.0F};
    float sum = 0.0F;
    int count = 5;

    while(count --> 0)
    {
        printf("Enter a number for entry %d: ", 5-count);
        scanf("%f",numbers+count);
        sum += numbers[count];
    }
    printf("The sum is %f\n", sum);
    getch();
    return 0;
}