void do_foo(){ int foo[5]={0}; int i=0; for(i=0;i<5;i++){ printf("\n[%d] %d",i,foo[i]); foo[i]=999; } } void main(void) { do_foo(); do_foo(); } /* output: [0] 0 [1] 0 [2] 0 [3] 0 [4] 0 [0] 999 [1] 999 [2] 999 [3] 999 [4] 999 */