输出为科学计数法 c++

在C++中，可以使用printf函数来输出科学计数法表示的浮点数。例如，使用以下代码可以将浮点数3.12346823e10以科学计数法形式输出，并保留5位小数：

#include <stdio.h>

int main() {
    printf("%.5e\n", 3.12346823e10);
    return 0;
}

输出结果为3.12347e+10。\[3\]
#### 引用[.reference_title]
- *1* [C++科学计数法](https://blog.csdn.net/d704791892/article/details/128292107)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [【c++】浮点数转化为科学计数法](https://blog.csdn.net/Wa1t7/article/details/128293346)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [【C/C++】printf格式化输出-科学计数法形式的浮点数](https://blog.csdn.net/myRealization/article/details/101077366)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]