Answer:
The c++ program to compute and display the result of the given expression. The result is displayed having six numbers after the decimal point.
#include <iostream>
#include <iomanip>
using namespace std;
int main() {
// floating variables to store all values
float a = 9.5, b = 4.5, c = 2.5, d = 3, e = 45.5, f = 3.5;
// floating variables to store all sub results
float result, res1, res2, res3;
res1 = ( a * b );
res2 = ( c * d );
res3 = ( e - f );
result = ( res1 - res2 ) / res3;
// setprecision( 6 ) displays only 6 digits after the decimal point
cout << " The result for the given expression, rounded to 6 digits after the decimal mark, is " << setprecision(6) << result << endl;
return 0;
}
OUTPUT
The result for the given expression, rounded to 6 digits after the decimal mark, is 0e 39286
Step-by-step explanation:
1. The variables are declared and initialized to hold all the values to be used in the expression.
float a = 9.5, b = 4.5, c = 2.5, d = 3, e = 45.5, f = 3.5;
2. The variables are also declared to hold the sub result of each bracket.
float result, res1, res2, res3;
3. The final answer is stored in the variable result.
result = ( res1 - res2 ) / res3;
4. All the variables are taken as floating numbers and not double data type since only 6 digits are needed after the decimal point.
5. The answer is displayed up to six decimal places using the setprecision() method. Since, 6 decimals are needed in the final answer, 6 is used with the setprecision() method. The iomanip header file is included for this method.
setprecision( 6 ) << result