char finalPathSet[256][256];  char middlePathSet[256][256];  int finalSetSize=0;  int middleSetSize=0; int addToPathSet(char path[]){     strcpy(middlePathSet[middleSetSize],path);     middleSetSize++; } int meetPathSet(){     char tempPathSet[256][256];     int tempSetSize=0;     int i,j;        if(finalSetSize==0){          for(i=0;i<middleSetSize;i++){             strcpy(finalPathSet[i],middlePathSet[i]);                                                 }          finalSetSize=middleSetSize;     }     else{         for(i=0;i<finalSetSize;i++){             for(j=0;j<middleSetSize;j++){                 if(strcmp(finalPathSet[i],middlePathSet[j])==0){                      strcpy(tempPathSet[tempSetSize],finalPathSet[i]);                      tempSetSize++;                 }                                                                                            }         }        for(i=0;i<tempSetSize;i++){            strcpy(finalPathSet[i],tempPathSet[i]);        }                                 finalSetSize=tempSetSize;     } }