Return multiple values from scanf() without requiring 2 or more inputs? C language-CodePudding

I'm currently in college in a C language class. I always like to make the assignments given to me to be programmed user-friendly and neatly. So, keep in mind I'm beginner level at this stuff.

Although this is basic, I just need help with this:

1    int count, sum, max, input;
2    count = 1;
3    sum = 0;
4    input = 0;
5    printf("This program will find the sum of your given 
6          input of an integer.\n");
7    printf("Please enter the number you would like the sum 
8          of: ");
9    scanf("%d", &max, &input);
10   while (count <= max){
11        sum = sum   count;
12        count  ;
13    }
14    printf("The sum of %d is %d.\n", input, sum);
15    printf("==To exit the program, please enter anything, 
16          then press enter==");
17    scanf("%d");
18    return;
}

I want to let the user know on line 14 of what they entered firstly while also giving them the sum of what they entered. How can I do this?

EDIT: I know that line 9 makes no sense, but that's where I am having the issue. I have seen scanf("%d%d", &var, &var);, but that requires the user to have 2 inputs. I only want 1 input. In other words, if a user inputs a number, I want that only 1 input to go into both max and input.

EDIT 2: For example, if you input to want to have the sum of 10, I want line 14 to show the input you entered as well as show the sum of 10.

CodePudding user response：

scanf() will only assign to as many variables as there are format operators in the format string. The extra variable you provide is ignored, it doesn't get a copy of the same input value.

Use an ordinary assignment to copy the entered value into the second variable.

scanf("%d", &max);
input = max;

CodePudding user response：

I think you dont need to declare an extra variable "input".(Since the value of max never changes in your code.)

Just check the below code:

1    int count, sum, max;  //removed input
2    count = 1;
3    sum = 0;
4                    //removed input
5    printf("This program will find the sum of your given 
6          input of an integer.\n");
7    printf("Please enter the number you would like the sum 
8          of: ");
9    scanf("%d", &max);
10   while (count <= max){
11        sum = sum   count;
12        count  ;
13    }
14    printf("The sum of %d is %d.\n", max, sum); //replaced input by max
15    printf("==To exit the program, please enter anything, 
16          then press enter==");
17    scanf("%d");
18    return;
}