I am writing a student report card system, and while implement a if-else grading system starting from " if(st[i].per>=80){", i am getting an error saying [Error] assignment to expression with array type, how do i tackle it and solve it ? i have to submit it this week, i solved all the other problems, and i am sorry if i didnt indent it properly in stack.
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>
int i=0;
struct student{
char fName[50];
char lName[50];
char FatherName[50];
char Branch[50];
char Div[12];
int roll, engmech, epc, chem, pps, maths;
float per;
char grade[100];
int cid[10];
}st[55];
void add_student(){
printf("\nAdd New Student Info");
printf("\n--------------------");
printf("\nEnter Student's First Name:");
scanf("%s", st[i].fName);
printf("\nEnter Student's Last Name:");
scanf("%s", st[i].lName);
printf("\nEnter Roll Number:");
scanf("%d", &st[i].roll);
printf("\nEnter Branch:");
scanf("%s", st[i].Branch);
printf("\nEnter Division:");
printf("%s", st[i].Div);
printf("\nEnter Marks for Engineering Mechanics:");
scanf("%d", &st[i].engmech);
printf("\nEnter Marks for Mathematics:");
scanf("%d", &st[i].maths);
printf("\nEnter Marks for Computer Science:");
scanf("%d", &st[i].engmech);
printf("\nEnter Marks for English:");
scanf("%d", &st[i].epc);
printf("\nEnter Marks for Chemistry:");
scanf("%d", &st[i].chem);
st[i].per=st[i].engmech+st[i].maths+st[i].epc+st[i].chem+st[i].pps/5.0 *100;
if(st[i].per>=80){
st[i].grade="A";
}
else if(st[i].per>=60){
st[i].grade="B";
}
else if(st[i].per>=40){
st[i].grade="C";
}
else if(st[i].per<40){
st[i].grade="F";
}
for(int j=0;j<5;j++){
scanf("%d", &st[i].cid[j]);
}
i=i+1;
}
void find_Rstudent()
{
int x;
printf("\nEnter the Roll Number of the Student:");
scanf("%d", &x);
for(int j=1;j<i;j++){
if (x==st[i].roll){
printf("\nHere are your search Results");
printf("\nName of the student:%s %s %s",st[i].fName, st[i].FatherName, st[i].lName);
printf("\nBranch_Class:%s %s", st[i].Branch, st[i].Div);
printf("\nRoll No:%d", st[i].roll);
printf("\nMarks Obtained in Engineering Mechanics:%d", st[i].engmech);
printf("\nMarks Obtained in Mathematics:%d", st[i].engmech);
printf("\nMarks Obtained in Computer Science:%d", st[i].pps);
printf("\nMarks Obtained in English:%d", st[i].epc);
printf("\nMarks Obtained in Chemistry:%d", st[i].chem);
printf("\nPercentage Scored: %f",st[i].per);
printf("\nGrade Obtained:%s", st[i].grade);
}
for(int j=0;j<5;j++){
printf("\nThe course ID is:%d",st[i].cid);
}
break;
}
}
void update_student(){
printf("\nEnter Roll Number to update Entry:");
long int x;
scanf("%ld", &x);
for (int j=0;j<i;j++){
if(st[j].roll==x){
printf("\n1.First Name");
printf("\n2.Father's Name:");
printf("\n3.Roll No.");
printf("\n4.Percentage");
printf("\n5.Grade");
int z;
scanf("%d", &z);
switch(z){
case 1:
printf("\nEnter New First Name:");
scanf("%s",st[i].fName);
break;
case 2:
printf("\nEnter New Father's Name:");
scanf("%s", st[i].FatherName);
break;
case 3:
printf("\nEnter New Roll no:");
scanf("%d", &st[i].roll);
break;
case 4:
printf("\nEnter New Percentage:");
scanf("%f", &st[i].per);
break;
case 5:
printf("\nEnter New Grade:");
scanf("%s", &st[i].grade);
break;
}
printf("\nUpdated Successfully");
}
}
}
void main()
{
printf("\nWelcome to Knight's College of Engineering and Technology");
int choice, count;
while(i=1){
printf("\nWhat task do you want to perform ?");
printf("\n1.Add a new student details");
printf("\n2.Find an existing Student");
printf("\n3.Modify an exisitng Student Info");
printf("\n4.Exit");
scanf("%d", &choice);
switch(choice){
case 1:
add_student();
break;
case 2:
find_Rstudent();
break;
case 3:
update_student();
break;
case 4:
exit(0);
break;
}
}
}
