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Commit
a7d496ee
authored
6 years ago
by
otsall
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parent
c21cfaac
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Lab9/task3.c
Lab9/task3.c
0 → 100644
View file @
a7d496ee
#include <stdio.h>
#include <ctype.h>
#include <string.h>
int
isint
(
char
a
);
int
main
(){
char
string
[
100
];
int
len
,
i
;
do
{
puts
(
"please input an integer."
);
scanf
(
"%s"
,
string
);
len
=
strlen
(
string
);
for
(
i
=
0
;
i
<
len
;
i
++
){
if
(
isint
(
string
[
i
])
==
0
){
puts
(
"input is not an integer"
);
break
;
}
}
}
while
(
i
<
len
);
puts
(
"the input is an integer"
);
return
0
;
}
int
isint
(
char
a
){
int
result
=
isdigit
(
a
);
return
result
;
}
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