# I have a c++ language beginner question.

Asked 1 weeks ago, Updated 1 weeks ago, 1 views

Even if you enter numbers that do not fall apart by dividing them into 10 and 4, the decimal point does not come out properly. How can I get a decimal point? ㅠ<

``````    int a,b,c;
printf ("Please enter a number to calculate."\n");
scanf("%d %d",&a,&b);
printf ("plus = 1 minus = 2 multiplied = 3 divided = 4\n");
scanf("%d",&c);
if (c==1)
printf("%.3f",(a+b)*1.0);
else if (c==2)
printf("%.3f",(a-b)*1.0);
else if (c==3)
printf("%.3f",(a*b)*1.0);
else
printf("%.3f",(a/b)*1.0);
return 0;

``````

Below is the execution screen

c++ calculator

2022-09-20 15:07

The result of the operation between two integers is an integer.

Like `(double)a/b`, if you accidentally convert the value of a and divide it by b, it is a real number/integer, so the result is a real number.

Please refer to the code below.

``````#include <stdio.h>

int main()
{
int a, b, c;
printf ("Please enter a number to calculate."\n");
scanf("%d %d", &a, &b);
printf ("plus = 1 minus = 2 multiplied = 3 divided = 4\n");
scanf("%d", &c);
if (c == 1)
printf("%.3f", (double)a + b);
else if (c == 2)
printf("%.3f", (double)a - b);
else if (c == 3)
printf("%.3f", (double)a * b);
else
printf("%.3f", (double)a / b);
return 0;
}
``````

2022-09-20 15:07

Popular Tags
python x 1175
android x 247
c x 235
java x 192
javascript x 106
mysql x 30
html x 27
node.js x 24
php x 21
list x 19