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#include <iostream>
using namespace std; 
 
double result;
double number1;
double number2;
double number3;
double number4;
double number5;
string firstname;
string lastname;
 
int main() 
{
    cout<<endl;
    cout<<"Enter student's first name: ";
    cin>>firstname;
    cout<<"Enter student's last name: ";
    cin>>lastname;
    cout<<"Enter a score for the first test: ";
    cin>>number1;
    cout<<"Enter a score for the second test: ";
    cin>>number2;
    cout<<"Enter a score for the third test; ";
    cin>>number3
    cout<<"Enter a score for the fourth test: ";
    cin>>number4;
    cout<<"Enter a score for the fifth test: ";
    cin>>number5;
    cout<<endl;
 
    cout<<"Your entered the following scores for student name "<<firstname<<" "<<lastname<<": "<<number1<<", "<<number2<<", "<<number3<<", "<<number4<<", and "<<number5<<". "<<endl;
    result = (number1+number2+number3+number4+number5)/5; //process
    cout<<endl;
 
    cout<<"Student name: "<<firstname<<" "<<lastname<<endl;
    cout<<"The Average is: "<<result<<". "<<endl; 
    cout<<"Your grade is: ";
 
if (result>=90 & result<100)
{
    cout<<"A"<<endl; 
}
if (result>=80 & result<90)
{
    cout<<"B"<<endl;
}
if (result>=70 & result<80)
{
    cout<<"C"<<endl;
}
if (result>=65 & result<70)
{
    cout<<"D"<<endl;
}
if (result<=65)
{
    cout<<"F"<<endl;
}
    if (result>=97 & result<100)
{
    cout<<"Your GPA is 4.0"<<endl;
}
    if (result>=93 & result<96)
{    
    cout<<"Your GPA is 4.0"<<endl;
}
    if (result>=90 & result<92)
{
    cout<<"Your GPA is 3.7"<<endl;
}    
    if (result>=87 & result<89)
{
    cout<<"Your GPA is 3.3"<<endl;
}
    if (result>=83 & result<86)
{
    cout<<"Your GPA is 3.0"<<endl;
}
    if (result>=80 & result<82)
{
    cout<<"Your GPA is 2.7"<<endl;
}
    if (result>=77 & result<79)
{
    cout<<"Your GPA is 2.3"<<endl;
}    
    if (result>=73 & result<76)
{
    cout<<"Your GPA is 2.0"<<endl;
}    
    if (result>=70 & result<72)
{
    cout<<"Your GPA is 1.7"<<endl;
}
    if (result>=67 & result<69)
{
    cout<<"Your GPA is 1.3"<<endl;
}
    if (result>=65 & result <66)
 
{
    cout<<"Your GPA is 1.0"<<endl;
}
    if (result<65)
{
    cout<<"Your GPA is 0.0"
}
    return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:26:5: error: expected ‘;’ before ‘cout’
     cout<<"Enter a score for the fourth test: ";
     ^
prog.cpp:40:11: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
 if (result>=90 & result<100)
           ^
prog.cpp:44:11: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
 if (result>=80 & result<90)
           ^
prog.cpp:48:11: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
 if (result>=70 & result<80)
           ^
prog.cpp:52:11: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
 if (result>=65 & result<70)
           ^
prog.cpp:60:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=97 & result<100)
               ^
prog.cpp:64:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=93 & result<96)
               ^
prog.cpp:68:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=90 & result<92)
               ^
prog.cpp:72:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=87 & result<89)
               ^
prog.cpp:76:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=83 & result<86)
               ^
prog.cpp:80:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=80 & result<82)
               ^
prog.cpp:84:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=77 & result<79)
               ^
prog.cpp:88:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=73 & result<76)
               ^
prog.cpp:92:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=70 & result<72)
               ^
prog.cpp:96:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=67 & result<69)
               ^
prog.cpp:100:15: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
     if (result>=65 & result <66)
               ^
prog.cpp:108:1: error: expected ‘;’ before ‘}’ token
 }
 ^

Standard output is empty