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

int main() {
    const char *code = 
        "#include<stdio.h>\n"
        "#include<stdlib.h>\n"
        "int main() {"
        "FILE *fp = fopen(\"hello1.c\", \"w\");"
        "fprintf(fp, \"main(){puts(\\\"Hello World!\\\");}\");"
        "fclose(fp);"
        "system(\"gcc hello1.c -o hello1 > /dev/null\\n./hello1\");"
        "return 0;"
        "}";
    FILE *fp = fopen("hello2.c", "w");
    fprintf(fp, code);
    fclose(fp);
    system("gcc hello2.c -o hello2 > /dev/null\n./hello2");
    return 0;
}