给出以下C代码:
int nSum = 0;
// pNumber is 9109190866037
int nDigits = strlen(pNumber);
int nParity = (nDigits-1) % 2;
char cDigit[2] = "\0";
for (int i = nDigits; i > 0 ; i--)
{
cDigit[0] = pNumber[i-1];
int nDigit = atoi(cDigit);
if (nParity == i % 2) {
nDigit = nDigit * 2;
}
nSum += nDigit/10;
nSum += nDigit%10;
printf("NUMBER: %d\n", nSum);
}
输出:
NUMBER: 13
NUMBER: 13
NUMBER: 16
NUMBER: 22
NUMBER: 29
NUMBER: 29
NUMBER: 38
NUMBER: 39
NUMBER: 48
NUMBER: 48
NUMBER: 50
NUMBER: 59
NUMBER: 59
此JavaScript代码(使用TypeScript编写,因此实际上也涉及打字,但大多是推断的):
let nSum = 0;
let nDigits = partialIdNumber.length;
let nParity = (nDigits - 1) % 2;
let cDigit = "\0";
for (let i = nDigits; i > 0; i--) {
cDigit = partialIdNumber[i - 1];
let nDigit = parseInt(cDigit);
if (nParity == i % 2) {
nDigit = nDigit * 2;
}
nSum += nDigit / 10;
nSum += nDigit % 10;
console.log("NUMBER: %d", nSum);
}
输出:
NUMBER: 14.3
NUMBER: 14.3
NUMBER: 17.5
NUMBER: 24.1
NUMBER: 31.700000000000003
NUMBER: 31.700000000000003
NUMBER: 41.5
NUMBER: 42.6
NUMBER: 52.4
NUMBER: 52.4
NUMBER: 54.6
NUMBER: 64.5
注意:这两种实现都是相同的,只是语言不同。
C代码产生预期的结果,而JavaScript无法产生预期的结果。
问题
答案 0 :(得分:3)
使用除法后,您需要将数字转换为整数值。
var partialIdNumber ='9109190866037'
let nSum = 0;
let nDigits = partialIdNumber.length;
let nParity = (nDigits - 1) % 2;
let cDigit = "\0";
for (let i = nDigits; i > 0; i--) {
cDigit = partialIdNumber[i - 1];
let nDigit = +cDigit;
if (nParity == i % 2) {
nDigit = nDigit * 2;
}
nSum += Math.floor(nDigit / 10); // int
nSum += nDigit % 10;
console.log("NUMEBR: %d", nSum);
}