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isalnum() - ctype.h in c - CodeGK
Δ C References
string.h
strcat()
strcmp()
strcpy()
strlen()
math.h
acos()
acosh()
asin()
asinh()
atan()
atan2()
atanh()
cbrt()
ceil()
cos()
cosh()
exp()
fabs()
floor()
hypot()
log()
log10()
pow()
sin()
sinh()
sqrt()
tan()
tanh()
ctype.h
isalnum()
isalpha()
iscntrl()
isdigit()
isgraph()
islower()
isprint()
ispunct()
isspace()
isupper()
isxdigit()
tolower()
toupper()
♦ isalnum() - ctype.h
♣ Example1: isalnum()
Input:
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#include <stdio.h> #include <ctype.h> char main() { char c1 = 'A'; int r1 = isalnum(c1); printf("%d\n", r1); char c2 = '6'; int r2 = isalnum(c2); printf("%d\n", r2); char c3 = '\t'; int r3 = isalnum(c3); printf("%d\n", r3); char c4 = '*'; int r4 = isalnum(c4); printf("%d\n", r4); return 'm'; }
Output:
