#include #include #include #include // Declare a struct with names and scores typedef struct { char *name; int score; } Entry; int main() { // Declare identificators for Loops and temporary stores int i, j, temp; char empo[4]; // Deaclare variables for counting rows in data the file int ch = 0; int entryCount = 0; // Open input file for reading data // First column in the file consists size of name // Second column in the file consists name // Third column in the file consists score FILE *input = fopen("C:/C/sorting.txt", "r"); // For counting number of rows in the file if (input == NULL) return 0; // Program return 0 if file is empty entryCount++; while ((ch = fgetc(input)) != EOF) // Program write number of rows to the entryCount { if (ch == '\n') entryCount++; } // Size of array Entry now equal entryCount Entry *entries = malloc(sizeof(Entry) * entryCount); // Rewind input file for geting data rewind(input); // Geting names and scores for (i = 0; i < entryCount; i++) { int nameLen; fscanf(input, "%i", &nameLen); entries[i].name = malloc(sizeof(char) * (nameLen + 1)); fscanf(input, "%s %i", entries[i].name, &entries[i].score); } // Sorting rows frome input file by scores for (i = 0; i < entryCount; i++) { for (j = 0; j < entryCount; j++) { if (i == j) continue; if (entries[i].score < entries[j].score) { temp = entries[i].score; entries[i].score = entries[j].score; entries[j].score = temp; strcpy(empo, entries[i].name); strcpy(entries[i].name, entries[j].name); strcpy(entries[j].name, empo); } } } // Open output file for writing result data FILE *output = fopen("C:/C/sorting-result.txt", "w"); // Writing output file row by row for (i = 0; i < entryCount; i++) { fprintf(output, "%i. %s: %i\n", i + 1, entries[i].name, entries[i].score); } // Erase array with names and scores for (i = 0; i < entryCount; i++) { free(entries[i].name); free(&entries[i].score); } free(entries); // Closing files fclose(input); fclose(output); }

Program for sorting data from file to file (PC only)