#includestdio.h/* Assume there is a file called 'file.c' in c:\tc directory. */int main(){FILE *fp;fp=fopen("c:\tc\file.c", "r");if(!fp) printf("Knowing is just not enough.");fclose(fp);return 0;}
#includestdio.hvoid main(){int a=3, b=5, c;c = a!=6 || b == 2;printf("c = %d\n", c);}