c读写文件
#include <stdio.h>#include <unistd.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
char *fileName = "/Users/gxf/CLionProjects/untitled/text.txt";
void writeFile();
void readFile();
void fwriteFile();
void getChar();
void fputChar();
void putGetChar();
void freadfile();
typedef struct {
int age;
char *name;
} person;
#define BUFFSIZE 1024
int main() {
// writeFile();
// readFile();
fwriteFile();
freadfile();
// getChar();
// fputChar();
// putGetChar();
return 0;
}
void freadfile() {
FILE *file2Read = fopen(fileName, "r");
person p;
int res = fread(&p, sizeof(person), 2, file2Read);
if (res != 1) {
perror("fread fail");
}
printf("person.age:%d, person.name:%s\n", p.age, p.name);
fclose(file2Read);
}
void putGetChar() {
while (1) {
char ch = getchar();
putchar(ch);
}
}
void fputChar() {
FILE *file2Write = fopen(fileName, "a+");
char *msg2Write = "ffffffffffff";
for (int i = 0; i < strlen(msg2Write); i++) {
fputc(msg2Write, file2Write);
printf("%c", msg2Write);
}
fclose(file2Write);
}
void getChar() {
FILE *file2Read = fopen(fileName, "r");
char ch;
while ((ch = fgetc(file2Read)) != EOF) {
putchar(ch);
}
}
void fwriteFile() {
person zhangsan = {19, "name"};
FILE *file2Write = fopen(fileName, "a+");
fwrite(&zhangsan, sizeof(person), 1, file2Write);
fclose(file2Write);
}
void readFile() {
char buff;
FILE *file2Read = fopen(fileName, "r");
while (fgets(buff, BUFFSIZE, (FILE *)file2Read) != EOF) {
printf("buff:%s\n", buff);
if(feof(file2Read))
break;
}
}
void writeFile() {
FILE *file2Write = fopen(fileName, "a");
fprintf(file2Write, "line1\n");
fputs("line2\n", file2Write);
fclose(file2Write);
}
文档来源：51CTO技术博客https://blog.51cto.com/u_2498536/3304105
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