预期的'，'或';' 在“ {”令牌{（C ++）之前

Question

So I'm getting this error when i compile my code (expected ',' or ';' before '{' token {) I know there may be many of these errors out there on stackoverflow, but can't seem to find a solution:

I'm new to c++. Here is the code: I have to read data from a text file (data.txt) and display it:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main(){

FILE *fptr;
char country[5][20];
int population[5];
int landMass[5];
int option;
int i;
int countryOption;
int gdp[5];
int populationDensity[5];
int gdpHead[5];

//open file for reading
fptr = fopen("data.txt", "r");      

//Error checking
if (fptr == NULL) {                
   printf("Unable to open data.txt");
   return(1);
}

//input from user
printf("Hi welome to the country database!");
getchar();
system("cls");
printf("Select a country for information:\n");
printf("1)Canada\n");
printf("2)Italy\n");
printf("3)China\n");
printf("4)USA\n");
printf("5)Russia\n");
printf("6)All\n");
printf("Type in the option you want:");
scanf("%d", &option);
system("cls");

//reads data from data.txt and assigns to variables
for (i = 1; i <= 5; i++) {
    fscanf(fptr, "%s %d %d %d", country[i], &population[i], &landMass[i], &gdp[i]);
    populationDensity[i] = (population[i]/landMass[i]);
    gdpHead[i] = ((gdp[i]*1000000)/population[i]); 

    if (option == 6) {
        printf("Here is info on all the countries in our database:\n");
        printf("Country: %s\n", country[i]);     
        printf("Population: %d\n", population[i]);
        printf("LandMass: %d\n", landMass[i]);
        printf("GDP: %d\n", gdp[i]);
        printf("Population density: %d\n", populationDensity[i]);
        printf("Population density: %d\n\n\n", gdpHead[i]);  
    }
}       

void countrySelection(int countryOption)
{
     printf("Here is some info on the country you chose:\n");
     printf("Country: %s\n", country[countryOption]);     
     printf("Population: %d\n", population[countryOption]);
     printf("LandMass: %d\n", landMass[countryOption]);
     printf("GDP: %d\n", gdp[countryOption]);
     printf("Population density: %d\n", populationDensity[countryOption]);
     printf("Population density: %d\n\n", gdpHead[countryOption]);  
}

//function that prints the info
if (option < 6) {
   countrySelection(option);
}                   

fclose(fptr);
system("pause");
return(0);

}

The data.txt looks like this:

Canada
42000000
9984670
1821000 
Italy
60920000
301230
2013000
China
1351000000
9706961
8227000   
USA
313900000
9826675
15680000
Russia
143000000
17098246
2015000  

Any one have a clue as to what the problem is???

Answer 1

You are defining void countrySelection(int countryOption) inside the main function, which is not allowed in c++.

Move the function above the main function and it should compile. Also you have to define the variables used in countrySelection as global variables, otherwise the function has no access to them.