Need help.

[ParadOx22]

Grade wont output.
*I only placed grade for A for now to test* but then it wont show.

#include <iostream>

using namespace std;
struct sData
{
    string fName;
    string lName;
    int tScore;
    char sGrade;
};
void findGrade (sData);
sData highest (int tScore);
int main()
{
    sData student[20];
    for (int x = 0;x<20;x++){
        cout<<"Enter Student's First name: ";
        cin>>student[x].fName;
        cout<<"Enter Student's Last name: ";
        cin>>student[x].lName;
        cout<<"Enter Student's test score: ";
        cin>>student[x].tScore;
        cout<<"Grade: "<<student[x].sGrade<<endl;
    }
    return 0;
}
//Student's grade.
void findGrade (sData student[])
{
    for (int k=0;k<20;k++)
    {
     if (student[k].tScore > 91){
        student[k].sGrade = 'A';
     }
    }
}

[Peter87]

findGrade is never called. sGrade has not been assigned a value when you try to print it one line 23.