#include <stdio.h>
#include <stdlib.h>

int CountCharacter(char, char []);

int main(int argc, char *argv[])
        {
        char TargetChar;
        int i;

        if(argc < 2 || strlen(argv[1]) != 1)
                {
                printf("Usage: %s character [file1]...\n", argv[0]);
                exit(1);
                }

        TargetChar = argv[1][0];

        if(argc == 2)
                printf("File: %s  Character: %c  Number: %d\n", "stdin", TargetChar, CountCharacter(TargetChar, stdin));
        else
                {
                for(i = 2; i < argc; i++)
                        printf("File: %s  Character: %c  Number: %d\n", argv[i], TargetChar, CountCharacter(TargetChar, argv[i]));
                }

        return 0;
        }

int CountCharacter(char TargetChar, char file[])
        {
        FILE *fp;
        int Num = 0, Ch;

        if(strcmp(file, "stdin"))
                if((fp = fopen(file, "r")) == NULL)
                        {
                        printf("Can't open file %s for read\n", file);
                        return -1;
                        }

        while((Ch = fgetc(fp)) != EOF)
                {
                if(Ch == TargetChar)
                        Num++;
                }

        if(fclose(fp) != 0)
                printf("Error closing file %s\n", file);

        return Num;
        }