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#include <stdio.h>                                         greeting(char *temp1, char *temp2){                                char name[400];        strcpy(name, temp2);        printf("Hello %s %s\n", temp1, name);}       main(int argc, char * argv[]){        greeting(argv[1], argv[2]);        printf("Goodbye %s %s\n", argv[1], argv[2]);}