Help with strings

[neopleasureline]

I'm a beginner and I'm having problems with some exercises. A few pointers in the right direction would be appreciated.

How do I count the number of tabs in a string? of words?

How do I switch the characters in a string with other characters?

 

[ArkM]

C string is an array of char with zero byte at the end.
If you know C loops (for loop, for example) and array indexing it's so simple...

 

[cpjust]

Use strlen() to get the length of the string.
Loop from 0 to strlen() and compare or swap the characters that you want.

 

[mmothe]

You read every character in the string in a loop and check with the following condition for TAB
tab=0;
if(ch=='\10')
tab++;
For word check Kernighan Ritchie Book the program is given there

 

[cpjust]

That's very bad programming for 2 reasons.
1. You've just obfuscated your code, since most people don't have the ASCII table memorized.
2. You've just thrown code portability out the window by making the assumption that the code will only be used on an ASCII based system.

Use '\t' for a tab character, '\n' for new line, '\r' for carriage return, ' ' for a space...