While Entering Numbers it becomes infinite loop, tell me where i did error.

Question

// Divisiblity Test for input numbers

// Prem 25.07.2024

#include <stdio.h>

int a[2],b[3],c;

int d[2]={0},i;

int main()

{ printf ("Write the range where you wnat to test divisiblity :\n");

scanf("%d",&a[0]);

scanf("%d",&a[1]);

printf ("\nBy which three numbers you want to test divisiblity ;\n");

//input

    scanf ("%d",&b[0]);

scanf ("%d",&b[1]);

    scanf ("%d",&b[2]);

for (c=a[0]; c<=a[1]; a[0]++)

{

if (a[0]%b[0]==0|| a[0]%b[1]==0||a[0]%b[2]==0)

{

d[0]++;

}

else

{

d[1]++;

}

}

printf("Total numbers that ranges from 1 to 100 and \nthat are divisible by 2,3 or 5 is %d",d[1]);

printf("\nTotal numbers that ranges from 1 to 100 and \n that are not divisible by 2,3 or 5 is %d",d[2]);

return 0;

}

Answer 1

You increment not your loop variable, but the initial value of your loop, hence the infinite loop. Find the fix below in yellow.

#include <stdio.h>

int a[2], b[3], c;
int d[2] = { 0 }, i;

int main()
{
    printf("Write the range where you wnat to test divisiblity :\n");
    scanf("%d", &a[0]);
    scanf("%d", &a[1]);
    printf("\nBy which three numbers you want to test divisiblity :\n");

    //input
    scanf("%d", &b[0]);
    scanf("%d", &b[1]);
    scanf("%d", &b[2]);

    for (c = a[0]; c <= a[1]; c++)
    {
        if (c % b[0] == 0 || c % b[1] == 0|| c % b[2] == 0)
        {
            d[0]++;
        }
        else
        {
            d[1]++;
        }
    }

    printf("Total numbers that ranges from 1 to 100 and \nthat are divisible by 2,3 or 5 is %d",d[1]);
    printf("\nTotal numbers that ranges from 1 to 100 and \n that are not divisible by 2,3 or 5 is %d",d[2]);

    return 0;
}

Answer 2

your code went to infinite loop because the variable C on which your for loop is based on to iterate is not incremented properly

There are some mistakes in your code to be corrected inorder to get desired output

#include <stdio.h>

int a[2],b[3],c;

int d[2]={0},i;

int main()

{ printf ("Write the range where you wnat to test divisiblity :\n");

scanf("%d",&a[0]);

scanf("%d",&a[1]);

printf ("\nBy which three numbers you want to test divisiblity ;\n");

//input

    scanf ("%d",&b[0]);

scanf ("%d",&b[1]);

    scanf ("%d",&b[2]);

for (c=a[0]; c<=a[1]; c++)

{

if (c%b[0]==0|| c%b[1]==0||c%b[2]==0)

{

d[0]++;

}

else

{

d[1]++;

}

}

printf("Total numbers that ranges from %d to %d and \nthat are divisible by 2,3 or 5 is %d",a[0],a[1],d[1]);

printf("\nTotal numbers that ranges from %d to %d and \n that are not divisible by 2,3 or 5 is %d",a[0],a[1],d[2]);

return 0;

}