javascript four arithmetic operations accuracy correction function code_javascript skills

The function code is as follows:

Copy code The code is as follows:

/*
* Four arithmetic operations Precision correction function
* m value 1 (number)
* n value 2 (number)
* op operator (string)
*/
function fixMath(m, n, op) {
var a = (m " ");
var b = (n " ");
var x = 1;
var y = 1;
var c = 1;
if(a.indexOf( ". ")> 0) {
x = Math.pow(10, a.length - a.indexOf( ". ") - 1);
}
if(b.indexOf( ". ")> 0) {
y = Math.pow(10, b.length - b.indexOf( ". ") - 1);
}
switch(op)
{
case ' ':
case '- ':
c = Math.max(x,y);
m = Math.round(m*c) ;
n = Math.round(n*c);
break;
case '* ':
c = x*y
m = Math.round(m*x);
n = Math.round(n*y);
break;
case '/ ':
c = Math.max(x,y);
m = Math.round( m*c);
n = Math.round(n*c);
c = 1;
break;
}
return eval( "( " m op n ")/ " c);
}

Function usage is as follows:

Copy code The code is as follows:

fixMath(2.3, 1.9, '* ')
fixMath(1.98, 1.9, '- ')
fixMath(83.50, 74.15, '- ')