#include #include #include #include int main(int argc, char* argv[]){ char plaintext[] = "this is a plaintex message."; char ciphertext[sizeof(plaintext)]; char plaintext2[sizeof(plaintext)]; encrypt(plaintext, 3, ciphertext); printf(" plaintext = \"%s\"\n", plaintext); printf("ciphertext = \"%s\"\n", ciphertext); decrypt(ciphertext, 3, plaintext2); printf(" plaintext = \"%s\"\n", plaintex2); if (strcmp(plaintext, plaintext2) == 0) printf("success\n"); else printf("fail\n"); return 0; }