Hello World C

Running a C app

In the terminal of shell create a hello.c file with vim.

vim hello.c

copy paste the following

#include <stdio.h>

int main(void) {
    int num;
    printf("Hello world! Give me an integer:\n");
    scanf("%d", &num);
    printf("Thanks! I've always been fond of %d.\n", num);
    return 0;
}

Click esc then type the following and press enter.

:wq

run the following to create an executable file "hello" and run the helloworld program.

gcc -o hello hello.c
./hello

To look at the assembly code run

objdump -d hello