#include int countKeyChar(char *buffer, char keyChar){int i;int cnt = 0;for(i=0; buffer[i] != '\0'; i++){if(buffer[i] = keyChar){cnt++;}}return cnt;}

FILE *openFile(char *fileName, char *openMethod){FILE *fp;if(fp = fopen(fileName, openMethod) == NULL){printf("Cannot open file!\n");exit(0);}return fp;}

void closeFile(FILE *fp){if(fp == NULL){printf("No file!\n");exit(0);}fclose(fp);}

int getFileLength(FILE *fp){int len;fseek(fp, 0, SEEK_END); //将文件指针移到文件末尾len = ftell(fp);printf("%d.......",len);return len;}

char *readData(FILE *fp, int n){int i;char *buffer;buffer = (char *)malloc(sizeof(char) * n + 1);for(i=0; i