Does the while loop test its condition before or after it performs an iteration?

(cin within a loop) Write and run a C++ program that accepts 10 values of gallons, one at a time, and converts each value entered to its liter equivalent before the next value is requested. Use a for loop in your program. Use the fact that 1gallon=3.785liters.

(Misc. application) Four experiments are performed, and each experiment has six test results. The results for each experiment are given in the following list. Write a program using a nested loop to compute and display the average of the test results for each experiment. 1stexperimentresults:23.23116.92725.428.62ndexperimentresults:34.845.227.936.833.439.43rdexperimentresults:19.416.810.220.818.913.44thexperimentresults:36.93949.245.142.750.6

(Numerical) Write a program that tests the effectiveness of the rand() library function. Start by initializing 10 counters to 0, and then generate a large number of pseudorandom integers between 0 and 9. Each time a 0 occurs, increment the variable you have designated as the zero counter; when a 1 occurs, increment the counter variable that’s keeping count of the 1s that occur; and so on. Finally, display the number of 0s, 1s, 2s, and so on that occurred and the percentage of the time they occurred.

(Desk check) Determine the value in total after each of the following loops is executed: a.total=0;for( i=1;i=10;i=i+1)total=total+1;b.total=1;for( count=1;count=10;count=count+1)total=total2;c.total=0;for( i=10;i=15;i=i+1)total=total+i;d.total=50;for( i=1;i=10;i=i+1)total=totali;e.total=1;for( icnt=1;icnt=8;++icnt)total=totalicnt;f.total=1.0;for( j=1;j=5;++j)total=total/2.0;

Which of the following is not required of a loop control variable in a correctly working loop? It is reset to its initial value before the loop ends. It is initialized before the loop starts. It is tested. It is altered in the loop body.

(Electrical eng.) a. An electrical manufacturer tests five generators by measuring their output voltages at three different times. Write a C++ program that uses a nested loop to enter each generator’s test results, and then computes and displays the average voltage for each generator. Assume the following generator test results: 1stgenerator:122.5122.7123.02ndgenerator:120.2127.0125.13rdgenerator:121.7124.9126.04thgenerator:122.9123.8126.75thgenerator:121.5124.7122.6 b. Modify the program written for Exercise 3a to calculate and display the average voltage for all the generators. (Hint: Use a second variable to store the total of all the generator’s voltages.)