C 中的嵌套 IF else 语句

Question

I can't seem to locate the problem in my program where it says, "error: expected declaration or statement at the end of input"

I would like to learn more about this mistake

#include<stdio.h>

int main()
{
    float Math, English, Science, Fundamentals, per;
    
    printf("Enter GPA of 4 subject\n");
    scanf("%f %f %f %f", &Math, &English, &Science, &Fundamentals);
    
    per = (Math + English + Science + Fundamentals) / 4.0;
    
    if(per >= 5)
    {
        printf("Your GWA is: 75\n");
    }
    else
    {
        if(per >= 3)
        {    
            printf("Your GWA is: 75\n");
        }
        else
        {
            if(per >= 2)
            {
                printf("Your GWA is: 85\n");
            }
            else
            {
                if(per >= 1)
                {
                      printf("Your GWA is: 100\n");
                }
            }
        }        
        
     return 0;
    }

Answer 1

According to what can be seen in the picture, you wrote return 0 inside the else section, while you should write the end of the main function.

Edit:

First line you have to add

#include <iostream>

And also before return 0 you need }