- 將字符串轉換為長整型數值：
#include <iostream>
#include <cstdlib>
int main() {
const char* str = "1234567890";
long long num = atoll(str);
std::cout << "Converted number: " << num << std::endl;
return 0;
}
- 處理帶符號的字符串：
#include <iostream>
#include <cstdlib>
int main() {
const char* str = "-9876543210";
long long num = atoll(str);
std::cout << "Converted number: " << num << std::endl;
return 0;
}
- 處理錯誤的輸入情況：
#include <iostream>
#include <cstdlib>
int main() {
const char* str = "abcd1234";
char* endptr;
long long num = atoll(str);
if (*endptr != '\0') {
std::cerr << "Error converting string to long long" << std::endl;
} else {
std::cout << "Converted number: " << num << std::endl;
}
return 0;
}
