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
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;
}
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