Question

SOLVE IN C: Given a double, create a program that can round up AND down to the nearest integer WITHOUT using the built in round() function. No built in math library functions are allowed.

Answer 1

Below is the C program for round the given double number without using round() function & math Library function

Code:

#include<stdio.h>
int main(void)
{
double v;
int con, r_value, mul;
printf("Please enter a value to be rounded: ");
scanf("%lf", &v);
mul=v*10;
con=mul%10;
r_value=mul/10;
if(con>=5)
r_value=r_value+1;
else
r_value=r_value;
printf("The rounded value is %.2d", r_value);

return 0;
}

Output:

Please enter a value to be rounded: 10.567

The rounded value is 11

Output Snapshots:

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