1. Make a program that calculates the average and standard deviation of marks of 10 students. Note that you cannot use 10 input variables. You should use loops for the purpose.
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Expert's answer
2011-11-22T12:26:01-0500
# include<iostream.h> # include<conio.h> void main(){ float a[10], ave, dev; int i; for (i=0;i<=9;i++){ & cout<<"Enter a mark of student "<<i+1<<": "; & cin>>a[i]; } ave = 0; for (i=0;i<=9;i++) ave = ave + a[i]; ave = ave/10; dev = 0; for (i=0;i<=9;i++) dev = dev + (a[i]-ave)*(a[i]-ave); dev = sqrt(dev/10); cout<<"Average is "<<ave<<"\n"<<" Standard deviation is "<<dev; getch(); }
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