"Syntax error: "(" unexpected", in obviously correct hello world code

[zubr]

Ubuntu, installed codeblocks via terminal command, created an empty file, saved it on a path, typed these codes in, build and run, then 3: Syntax error: "(" unexpected

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#include <stdio.h>

int main(){
    printf("a");
    return 0;}

[Miguel Gimenez]

Follow this guide from the FAQ.