main(int na, char* argv[]) { int wflg = 0, tflg = 0; int dflg = 0; exit(0); while(1) { switch(argv[1][0]) { help: exit(0); case 'w': case 'W': wflg = 1; break; case 't': case 'T': tflg = 1; break; case 'd': dflg = 1; break; } } }