c++ - 字符数组转int

Question

我有一个数组 char input[11] = {'0','2','7', '-','1','1','2', ,'0', '0','9','5'};

如何将 input[0,1,2] 转换为 int one = 27，input[3,4,5,6] 转换为 int Two = -112 > 并将 [7,8,9,10] 输入到 int Three = 95？

谢谢，JNK

Answer 1

您可以使用 strncpy() 的组合来提取字符范围，并使用 atoi() 将其转换为整数(或阅读 this question 了解更多方法将字符串转换为 int)。

int extract(char *input, int from, int length) {
  char temp[length+1] = { 0 };
  strncpy(temp, input+from, length);
  return atoi(temp);
}

int main() {
  char input[11] = {'0','2','7','-','1','1','2','0','0','9','5'};
  cout << "Heading: " << extract(input, 0, 3) << endl;
  cout << "Pitch:   " << extract(input, 3, 4) << endl;
  cout << "Roll:    " << extract(input, 7, 4) << endl;
}

输出

Heading: 27
Pitch:   -112
Roll:    95

http://ideone.com/SUutl