Webcout << fixed << setprecision(2); once before all other cout statements. Ex: If the input is: 5 30.0 50.0 10.0 100.0 65.0 the output is: 0.30 0.50 0.10 1.00 0.65 The 5 indicates that there are five floating-point values in the list, namely 30.0, 50.0, 10.0, 100.0, and 65.0. 100.0 is the largest value in the list, so each value is divided by 100.0. WebMar 10, 2024 · setprecision ios::scientific使用时的显示规律总结如下: 1. setprecision(n)表示输出n位小数,不足n位时补0。 2. ios::scientific表示使用科学计数法输出,即输出结果为a.xxxxxxe+b,其中a为小数部分,b为指数部分。
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WebJan 25, 2024 · C++. Question #158448. Driving is expensive. Write a program with a car's miles/gallon and gas dollars/gallon (both doubles) as input, and output the gas cost for 20 miles, 75 miles, and 500 miles. Output each floating-point value with two digits after the decimal point, which can be achieved by executing. cout << fixed << setprecision (2 ... Websetprecision( num ) does 1 of 2 things: If setprecision is used by itself, the value num specifies the total number of digits to display. If setprecision is used in conjunction with the fixed flag, the value num specifies the number of digits to display after the decimal point. num - must be an integer value listverse fashion
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WebOutput each floating-point value with two digits after the decimal point, which can be achieved by executing cout << fixed << setprecision (2); once before all other cout statements. #include #include using namespace std; int main () { double Age; // User input of Age. double Weight; // User input of weight. Web12.5 Assuming that diskInfo is an fstream object, write a statement that opens the file payable.txt for both input and output. diskInfo.open ("payable.dat", ios::in ios::out); 12.6 Write a statement that defines an fstream object named dataFile and opens a. file named salesfigures.txt for input. ( Note: The file should be opened with the ... WebMar 13, 2024 · 当使用setprecision和ios::fixed时,显示规律如下: 1. 如果小数位数小于设置的精度,则会在末尾补0,直到达到设置的精度。 2. 如果小数位数大于设置的精度,则会四舍五入到设置的精度。 3. 如果整数部分为0,则会显示0。 4. impact wrench tool rental