How to get substring in C

Question

I have a string  let s say  THESTRINGHASNOSPACES    I need something that gets a substring of 4 characters from the string  In the first call  I should get  THES   in the second  I should get  TRIN   in the third  I should get  GHAS   How can I do that in C

User · Answer

If the task is only copying 4 characters, try for loops. If it's going to be more advanced and you're asking for a function, try strncpy. http://www.cplusplus.com/reference/clibrary/cstring/strncpy/

strncpy(sub1, baseString, 4);
strncpy(sub1, baseString+4, 4);
strncpy(sub1, baseString+8, 4);

or

for(int i=0; i<4; i++)
    sub1[i] = baseString[i];
sub1[4] = 0;
for(int i=0; i<4; i++)
    sub2[i] = baseString[i+4];
sub2[4] = 0;
for(int i=0; i<4; i++)
    sub3[i] = baseString[i+8];
sub3[4] = 0;

Prefer strncpy if possible.

User · Answer

include  lt stdio h gt   include  lt string h gt   int main         char src      SexDrugsRocknroll       char dest 5      0       4 chars   terminator        int len   strlen src       int i   0       while  i 4  lt  len            strncpy dest  src  i 4   4           i             printf  loop  d    s n   i  dest

User · Answer

char originalString      THESTRINGHASNOSPACES        char aux 5       int j 0      for int i 0 i lt strlen originalString  i             aux j    originalString i           if j  3               aux j 1    0                printf   s n  aux               j 0           else              j

User · Answer

If you just want to print the substrings      char s      THESTRINGHASNOSPACES   size t i  slen   strlen s   for  i   0  i  lt  slen  i    4      printf    4s n   s   i

[c] How to get substring in C

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