try
{
int.Parse(data);
}
catch (FormatException)
{
result = false;
}

return result;

}

ex:how the code should look:

previous code:
scanf(“%d”,x) should be changed into

new code:
where x is a string now
where y is bool
where x is a int

do
{
//get the interger value
scanf(“%s”,x)

//use the function above to find wheather the given value is int or not.
y=IsInteger(x)

//if y is true i.e int then convert it into interger using atoi function.
if(y)
{
z=atoi(z);
}
else
{
printf(“error msg”);

//if false then scan the variable again
}while(!y)