oss << std::fixed << std::setprecision(2) << doubleValue;// 设置精度为 2std::string doubleStr = oss.str(); std::cout <<"Double to string with precision: "<< doubleStr << std::endl;return0; } 输出: Doubletostringwithprecision:3.14 7. 总结 std::to_string()是一个简单易用的函...
float 和double),其转换行为可能并不总是符合预期,特别是关于小数部分的处理。 1. std::to_string 的功能和用法 std::to_string 函数定义在 <string> 头文件中,它将给定的数值转换为字符串形式。对于浮点数,转换后的字符串将包含该数值的十进制表示,但小数位数可能不受控制,且可能因编译器和平台而异...
Prompts And Output Labels: Decimal values should be displayed using default precision, i.e. do not specify precision. Each item read should be prompted for by a string of the form "Enter the food eaten by monkey #N on DAY:" when N is 1 or 2 or 3 and DAY is "Sunday" or "M...
**Input Validation: Do not accept negative numbers for pounds of food eaten. When a negativevalueis entered, theprogramoutputs"invalid (negative) food quantity -- re-enter" and attempts to reread thevalue. Prompts AndOutputLabels: Decimalvaluesshould be displayed usingdefaultprecision, i.e...
Prompts And Output Labels: Decimal values should be displayed using default precision, i.e. do not specify precision. Each item read should be prompted for by a string of the form "Enter the food eaten by monkey #N on D...