I just installed Eclipse and MinGW on my sister's computer running Windows 7.
While I was testing to see if everything is set properly, I noticed that this won't print anything:
#include<stdio.h>
int main() {
int x;
printf("Hello World!\n");
printf("Enter a number... \n");
scanf("%d", &x);
printf("You entered %d", x);
return 0;
}
instead, it just waits for input, and print the whole thing at once.
Here's how it looks:
345
Hello World!
Enter a number...
You entered 345
It is only after I added a call to fflush(stdout) after printf("Enter a number... \n"); that Eclipse printed it in the right order, meaning, this code:
#include<stdio.h>
int main() {
int x;
printf("Hello World!\n");
printf("Enter a number... \n");
fflush(stdout);
scanf("%d", &x);
printf("You entered %d", x);
return 0;
}
Works exactly as expected.
It is worth mentioning that I opened a separate C++ project and tried the same thing:
#include<iostream>
int main() {
int x;
std::cout<<"Hello!\n";
std::cout<<"Enter a number\n";
std::cin>>x;
std::cout<<"you entered "<<x;
}
This worked perfectly fine, and prints without the need of flushing anything...
Why does Eclipse delay the output in C projects?
