#include int main() { char character; printf ("Do you want to proceed? (y|Y|n|N): "); scanf (" %c", &character); switch(character) { case 'y': printf ("\nYou may proceed\n"); break; case 'Y': printf ("\nYou may proceed\n"); break; case 'n': printf ("\nBye\n"); break; case 'N': printf ("\nBye\n"); break; default: printf ("\nSorry, that is not a valid character\n"); } }