How to scanf if there could be a char or int in the same input position
For example, if I have an input that looks like this : 10 3 128, but also have a second input that looks like this: 16 2 F
How can i scan these values?
I've tried reading it as a string and then trying to convert it to an int or leaving it as a char if needed.
fscanf(in, "%d %d %c or %d, from, to, numorhex);
My program is basically a numeral system converter, and i'd like to know how to scan hex characters as well as ints.
c char int scanf
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
add a comment |
For example, if I have an input that looks like this : 10 3 128, but also have a second input that looks like this: 16 2 F
How can i scan these values?
I've tried reading it as a string and then trying to convert it to an int or leaving it as a char if needed.
fscanf(in, "%d %d %c or %d, from, to, numorhex);
My program is basically a numeral system converter, and i'd like to know how to scan hex characters as well as ints.
c char int scanf
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
1
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20
add a comment |
For example, if I have an input that looks like this : 10 3 128, but also have a second input that looks like this: 16 2 F
How can i scan these values?
I've tried reading it as a string and then trying to convert it to an int or leaving it as a char if needed.
fscanf(in, "%d %d %c or %d, from, to, numorhex);
My program is basically a numeral system converter, and i'd like to know how to scan hex characters as well as ints.
c char int scanf
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
For example, if I have an input that looks like this : 10 3 128, but also have a second input that looks like this: 16 2 F
How can i scan these values?
I've tried reading it as a string and then trying to convert it to an int or leaving it as a char if needed.
fscanf(in, "%d %d %c or %d, from, to, numorhex);
My program is basically a numeral system converter, and i'd like to know how to scan hex characters as well as ints.
c char int scanf
c char int scanf
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
asked Nov 28 '18 at 16:15
Stan MarshStan Marsh
216
216
1
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20
add a comment |
1
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20
1
1
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20
add a comment |
2 Answers
2
active
oldest
votes
Firstly, you can store everything you scanned in int and also as char.
When you want to print it after scanning. You can do it from both types.
answered Nov 28 '18 at 16:27
mato0mato0
33
add a comment |
You can do something like that :
int main(void)
{
char *line = {"10 3 128", "16 2 F", NULL};
int nb1;
int nb2;
int nb3;
char letter;
char end;
for (size_t i = 0; line[i]; ++i) {
if (end = EOF, sscanf(line[i], "%d %d %d%c", &nb1, &nb2, &nb3, &end) == 3 && end == EOF) {
printf("number number number : %d %d %dn", nb1, nb2, nb3);
} else if (end = EOF, sscanf(line[i], "%d %d %c%c", &nb1, &nb2, &letter, &end) == 3 && end == EOF) {
printf("number number letter : %d %d %cn", nb1, nb2, letter);
} else {
printf("format line not supported : %sn", line[i]);
}
}
return (0);
}
Be really warry that le "%c" will accept any character, like '1', so maybe you will want to restrict the value get in %c at something you consider a letter.
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Firstly, you can store everything you scanned in int and also as char.
When you want to print it after scanning. You can do it from both types.
answered Nov 28 '18 at 16:27
mato0mato0
33
add a comment |
Firstly, you can store everything you scanned in int and also as char.
When you want to print it after scanning. You can do it from both types.
answered Nov 28 '18 at 16:27
mato0mato0
33
add a comment |
Firstly, you can store everything you scanned in int and also as char.
When you want to print it after scanning. You can do it from both types.
answered Nov 28 '18 at 16:27
mato0mato0
33
Firstly, you can store everything you scanned in int and also as char.
When you want to print it after scanning. You can do it from both types.
answered Nov 28 '18 at 16:27
mato0mato0
33
answered Nov 28 '18 at 16:27
mato0mato0
33
answered Nov 28 '18 at 16:27
mato0mato0
33
answered Nov 28 '18 at 16:27
mato0mato0
33
33
add a comment |
add a comment |
You can do something like that :
int main(void)
{
char *line = {"10 3 128", "16 2 F", NULL};
int nb1;
int nb2;
int nb3;
char letter;
char end;
for (size_t i = 0; line[i]; ++i) {
if (end = EOF, sscanf(line[i], "%d %d %d%c", &nb1, &nb2, &nb3, &end) == 3 && end == EOF) {
printf("number number number : %d %d %dn", nb1, nb2, nb3);
} else if (end = EOF, sscanf(line[i], "%d %d %c%c", &nb1, &nb2, &letter, &end) == 3 && end == EOF) {
printf("number number letter : %d %d %cn", nb1, nb2, letter);
} else {
printf("format line not supported : %sn", line[i]);
}
}
return (0);
}
Be really warry that le "%c" will accept any character, like '1', so maybe you will want to restrict the value get in %c at something you consider a letter.
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
add a comment |
You can do something like that :
int main(void)
{
char *line = {"10 3 128", "16 2 F", NULL};
int nb1;
int nb2;
int nb3;
char letter;
char end;
for (size_t i = 0; line[i]; ++i) {
if (end = EOF, sscanf(line[i], "%d %d %d%c", &nb1, &nb2, &nb3, &end) == 3 && end == EOF) {
printf("number number number : %d %d %dn", nb1, nb2, nb3);
} else if (end = EOF, sscanf(line[i], "%d %d %c%c", &nb1, &nb2, &letter, &end) == 3 && end == EOF) {
printf("number number letter : %d %d %cn", nb1, nb2, letter);
} else {
printf("format line not supported : %sn", line[i]);
}
}
return (0);
}
Be really warry that le "%c" will accept any character, like '1', so maybe you will want to restrict the value get in %c at something you consider a letter.
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
add a comment |
You can do something like that :
int main(void)
{
char *line = {"10 3 128", "16 2 F", NULL};
int nb1;
int nb2;
int nb3;
char letter;
char end;
for (size_t i = 0; line[i]; ++i) {
if (end = EOF, sscanf(line[i], "%d %d %d%c", &nb1, &nb2, &nb3, &end) == 3 && end == EOF) {
printf("number number number : %d %d %dn", nb1, nb2, nb3);
} else if (end = EOF, sscanf(line[i], "%d %d %c%c", &nb1, &nb2, &letter, &end) == 3 && end == EOF) {
printf("number number letter : %d %d %cn", nb1, nb2, letter);
} else {
printf("format line not supported : %sn", line[i]);
}
}
return (0);
}
Be really warry that le "%c" will accept any character, like '1', so maybe you will want to restrict the value get in %c at something you consider a letter.
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
You can do something like that :
int main(void)
{
char *line = {"10 3 128", "16 2 F", NULL};
int nb1;
int nb2;
int nb3;
char letter;
char end;
for (size_t i = 0; line[i]; ++i) {
if (end = EOF, sscanf(line[i], "%d %d %d%c", &nb1, &nb2, &nb3, &end) == 3 && end == EOF) {
printf("number number number : %d %d %dn", nb1, nb2, nb3);
} else if (end = EOF, sscanf(line[i], "%d %d %c%c", &nb1, &nb2, &letter, &end) == 3 && end == EOF) {
printf("number number letter : %d %d %cn", nb1, nb2, letter);
} else {
printf("format line not supported : %sn", line[i]);
}
}
return (0);
}
Be really warry that le "%c" will accept any character, like '1', so maybe you will want to restrict the value get in %c at something you consider a letter.
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
answered Nov 28 '18 at 16:43
Tom'sTom's
2,042420
2,042420
add a comment |
add a comment |
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1
You want to read base 16 numbers? Did you read the documentation?
– Shawn
Nov 28 '18 at 16:20