Linux下的C语言编程——文件操作



手动创建两个文本文件text1.txt,text2.txt,要求编程创建text3.txt,实现text1.txt和text2.txt文件中除去首行和末尾，其余对应的数据相加,三个文本的内容如下

text1.txt
begin
10 11 12
20 21 22
30 31 32
end 

text2.txt
begin
15 16 17
25 26 27
35 36 37
end 

text3.txt
begin
25 27 29
45 47 49
65 67 69
end

#include <stdio.h>#include <stdlib.h>int main(){FILE *o_fp;FILE *t_fp;FILE *th_fp;char ch;char ch1;char ch2;int temp1;int temp2;int sum;if((o_fp = fopen("text1.txt","r")) == NULL){printf("\ncannot open file\n");exit(0);}if((t_fp = fopen("text2.txt","r")) == NULL){printf("\ncannot open file\n");exit(0);}if((th_fp = fopen("text3.txt","w+")) == NULL){printf("\ncannot open file\n");exit(0);}while(((ch1 = fgetc(o_fp)) != EOF) && (ch2 = fgetc(t_fp)) != EOF){if(ch1 < '0' || ch1 > '9'){fputc(ch1,th_fp);}else{temp1 = (ch1 - '0'); temp2 = (ch2 - '0');sum = temp1 + temp2;ch = sum + '0';fputc(ch,th_fp);}}fclose(o_fp);fclose(t_fp);fclose(th_fp);    return 0;}