hello actually i tried both but it still is telling the same result so..please look into the thing....here is the problem savitra@savitra-laptop:~/programs$ gcc -o savvy savvy.c savvy.c:1:18: error: stdio.h: No such file or directory savvy.c: In function 'main': savvy.c:3: warning: incompatible implicit declaration of built-in function 'printf' savvy.c:3: warning: return type of 'main' is not 'int' savitra@savitra-laptop:~/programs$ cat savvy.c #include<stdio.h> void main() { printf("hello"); }