Answer to Question #5270 in C++ for aimelawan

Question

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.

Answer 1

# 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();
}