Print highest and lowest+sort

[c0dev0id]

So my problem here is I am trying to print each the highest and the lowest grades after the user inputs a grade for each. Then ill print the entire list unsorted and then sorted followed by the average and highest grade and lowest grade. Its been awhile but I think a nested loop here is needed but im not sure where to implement it or even how.
Here's what's actually done:

  #include<iostream>
 using namespace std;

int main()
 {int a[100];
 int grades;
 int runtotal=0;
 cout<<"How many grades do you have?"<<endl;
 cin>>grades;

for (int x=1; x<=grades;x++)
 {
     cout<<"\nGrade on test "<<x<<"?";
     cin>>a[x];
     runtotal= runtotal + a[x];
 }

cout<<"your average is: "<<runtotal/grades<<endl;
 cout<<"\n\n";

system("pause");
 return 0;
}

[c0dev0id]

Alright Ive made some progress but it gives me the wrong numbers, anyone could clarify this for me? What I put in comments was giving me problems and when I took it out the error was gone and it ran but the numbers come out wrong.

include<iostream>
 using namespace std;

int main()
 {int a[100];
 int grades;
 int runtotal=0;
 int y;
 
 cout<<"How many grades do you have?"<<endl;
 cin>>grades;

for (int x=1; x<=grades;x++)
 {
     cout<<"\nGrade on test "<<x<<"?";
     cin>>a[x];
     //for(int y=1; y<y+1; y++);
    {
     if(a[y]>a[y+1]);
    }
        {int temp = a[y+1];

				a[y+1] = a[y];

				a[y] = temp;
				cout<<"The lowest grade is: "<<a[y] <<endl;
				cout<<"the Highest grade is: "<<a[y+1] <<endl;
        }

     runtotal= runtotal + a[x];
 }

cout<<"your average is: "<<runtotal/grades<<endl;
 cout<<"\n\n";

system("pause");
 return 0;
}

[Dy7SLyTq]

a) for(int y=1; y<y+1; y++); //line 17 there are two things wrong here. the first being y<y+1. thats an infinite loop. y will always be one less than y+1. secondly there is a semicolon at the end, cause for another infinite loop.

b) line 19) why? its pointless to have an if statement (in 90% of the cases, with this being one of them) that is followed immediately by a semicolon.

finally... fix your formatting. its very hard to read your code

[youare29]

I think it maybe your "y" variable I don't see where you set it equal to anything.

P.S. oh, you did that in your commented out for loop.

Here is something I put together a long time ago to sort stuff for me.

template <typename A>
unsigned ArraySize(A &input){
	return sizeof(input)/sizeof(input[0]);
}

template <typename B>
void swap(B &input1,B &input2){
	B temp = input1;
	input1 = input2;
	input2 = temp;
}

template <typename C>
void Sort(C &input){
	for(unsigned min=0,max=ArraySize(input);min<max;min++){
		unsigned minDEX=min,maxDEX=--max;
		for(unsigned j=min;j<=max;j++){
			minDEX = input[minDEX]>input[j]?j:minDEX;
			maxDEX = input[maxDEX]<input[j]?j:maxDEX;
		}
		if(input[minDEX]==input[maxDEX])
			break;
		swap(input[min],input[minDEX]);
		swap(input[max],input[maxDEX==min?minDEX:maxDEX]);
	}
}

NOTE: this only works in C++ and not C

[c0dev0id]

Alright All I'm trying to do now is to give out what the highest grade is and what the lowest grade is repeatedly throughout and once more at the end.

#include<iostream>

using namespace std;

int main()
 {int a[101];
 int grades;
 int runtotal=0;
 int temp;
 int high=0;
 int low=0;
 
 cout<<"How many grades do you have?"<<endl;
 cin>>grades;

for (int x=1; x<=grades;x++)
 {
     cout<<"\nGrade on test "<<x<<"? ";
     cin>>a[x];
     
  

     runtotal= runtotal + a[x];
 }
 
 cout<<"\nThe unsorted list is:";
for(int x=1;x<=grades;x++)
{cout<< a[x]<<", ";
}
 
 for(int x=1; x < grades ; x++)
{ for(int index=1; index < grades ; index++)
  {if(a[index] > a[index+1])
 
   {
     temp=a[index+1];
     a[index+1]=a[index];
     a[index]=temp;
    }
  }
}

cout<<"\nThe sorted list is:";

for(int x=1; x <= grades ; x++)
{cout<< a[x]<<", ";
}
cout<<"\n";

cout<<"your average is: "<<runtotal/grades<<endl;
 cout<<"\n\n";

system("pause");
 return 0;
}