char s[256];
FILE* fp;
fp = fopen("test.txt", "r");
while(fgets(s,sizeof(s), fp)
{
if(s[0] == 'b')
{
(fgets(s,sizeof(s), fp);
printf("%s", s); // I will get b b bb b b b
//I want to count space here, I tried to use s and loop for but it doesn't work
}
}
After fgets get line, how can I search detail in line?
Author
For example:
I have a text file.
I want to count the space in line 2
========================
a a a aa a a a
b b bb b b b (line 2)
c c c cc c c
========================
Quote:Original post by fantasymeMaybe show what you tried and we can suggest modifications?//I want to count space here, I tried to use s and loop for but it doesn't work
strtok is useful for counting or splitting a string at a certain character.
sprintf is useful to parse a string into multiple variable types.
But as other will probably say, this is old C and you should use the C++ way with std, will be easier.
sprintf is useful to parse a string into multiple variable types.
But as other will probably say, this is old C and you should use the C++ way with std, will be easier.
I'm trying to compile your code right now, it would have been faster if you put it inside a main w/ all of the headers, just so everyone doesn't have to do it for you...
Your "while(fgets(s,sizeof(s), fp)" is missing a ")". Your "(fgets(s,sizeof(s), fp);" has an extra "(". How'd you get this code to compile?
Your "while(fgets(s,sizeof(s), fp)" is missing a ")". Your "(fgets(s,sizeof(s), fp);" has an extra "(". How'd you get this code to compile?
Author
sorry, it is not the full code.
Actually,I want to take the vector's detail in .x file.
I can get the detail in "char" using fgets() to get the detail by line.
I just want to know some idea to do it.
for example:
-1222;1223332;33403032; // all type char
I want to get the number in type of int.
I still stuck on how to get the detail in line.
I used for loop like...
for(int i = 0; s != ';';i++)
columnNum++;
but s !=';' is not work.
the program didn't find and compare what I want ';'
Actually,I want to take the vector's detail in .x file.
I can get the detail in "char" using fgets() to get the detail by line.
I just want to know some idea to do it.
for example:
-1222;1223332;33403032; // all type char
I want to get the number in type of int.
I still stuck on how to get the detail in line.
I used for loop like...
for(int i = 0; s != ';';i++)
columnNum++;
but s !=';' is not work.
the program didn't find and compare what I want ';'
This topic is closed to new replies.
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