將文件一和文件二中的數字兩位相加到第三個文件
阿新 • • 發佈：2019-02-09
1.txt
begin
10 11 12
20 21 22
30 31 32
end
2.txt
begin
15 16 17
25 26 27
35 36 37
end
#include <stdio.h>#include <stdlib.h>
int main()
{
FILE *p1,*p2,*p3;
char ch1,ch2,ch3,ch;
char a[2];
if((p1 = fopen("1.txt","r")) == NULL)
{
perror("open file error!\n");
exit(-1);
}
if((p2 = fopen("2.txt","r")) == NULL)
{
perror("open file error!\n");
exit(-1);
}
if((p3 = fopen("3.txt","w+")) == NULL)
{
perror("open file error!\n");
exit(-1);
}
while(((ch1 = fgetc(p1)) != EOF) && ((ch2 = fgetc(p2)) != EOF))
{
if(ch1 < '0' || ch2 > '9')
{
fputc(ch1,p3);
}
else
{
a[0] = ch1 + ch2 - '0';
ch1 = fgetc(p1);
ch2 = fgetc(p2);
a[1] = ch1 + ch2 - '0';
if(a[1] > '9')
{
a[1] -= 10;
a[0]++;
if(a[0] > '9')
{
a[0] -= 10;
}
}
ch3 = a[0];
fputc(ch3,p3);
ch3 = a[1];
fputc(ch3,p3);
}
}
fclose(p1);
fclose(p2);
fclose(p3);
return 0;
}