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Join Date: May 2004
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Newbie Poster
Lets say I have the following as a string:
097102099105110
What I want to do is find the ascii character represented by every set of 3 digits. So the ascii character of 97, then 102, 99, 105 and then 110.
Could anybody point me in the right direction here?
097102099105110
What I want to do is find the ascii character represented by every set of 3 digits. So the ascii character of 97, then 102, 99, 105 and then 110.
Could anybody point me in the right direction here?
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Join Date: Apr 2004
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One way:
#include <stdio.h>
int main(void)
{
const char text[] = "097102099105110";
int i, value[5];
if ( sscanf(text, "%3d%3d%3d%3d%3d", &value[0],
&value[1], &value[2], &value[3], &value[4]) == 5 )
{
for ( i = 0; i < 5; ++i )
{
printf("value[%d] = %d\n", i, value[i]);
}
}
return 0;
}
/* my output
value[0] = 97
value[1] = 102
value[2] = 99
value[3] = 105
value[4] = 110
*/ •
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Another way:
#include <stdio.h>
int main(void)
{
const char text[] = "097102099105110", *ptr = text;
int i, value;
while ( sscanf(ptr, "%3d%n", &value, &i) == 1 )
{
printf("value = %d\n", value);
ptr += i;
}
return 0;
}
/* my output
value = 97
value = 102
value = 99
value = 105
value = 110
*/ •
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Join Date: Apr 2004
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Sorry for multiple posts -- I just now noticed the ASCII part.
Assuming your system is ASCII, it's quite easy to convert the integer value to ASCII (do nothing).
Assuming your system is ASCII, it's quite easy to convert the integer value to ASCII (do nothing).
#include <stdio.h>
int main(void)
{
const char text[] = "097102099105110", *ptr = text;
int i, value;
while ( sscanf(ptr, "%3d%n", &value, &i) == 1 )
{
printf("value = %3d = '%c'\n", value, value);
ptr += i;
}
return 0;
}
/* my output
value = 97 = 'a'
value = 102 = 'f'
value = 99 = 'c'
value = 105 = 'i'
value = 110 = 'n'
*/ •
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Newbie Poster
Hi Dave,
What is the %n used for in sscanf(ptr, "%3d%n", &value, &i)? Thanks.
What is the %n used for in sscanf(ptr, "%3d%n", &value, &i)? Thanks.
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>What is the %n used for in sscanf(ptr, "%3d%n", &value, &i)?
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No input is consumed. The corresponding argument shall be a pointer to signed integer into which is to be written the number of characters read from the input stream so far by this call to the fscanf function. Execution of a %n directive does not increment the assignment count returned at the completion of execution of the fscanf function. No argument is converted, but one is consumed. If the conversion specification includes an assignment suppressing character or a field width, the behavior is undefined.
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Posting Whiz in Training
char chr = 'a';
cout<<chr; //will show the char
cout<<(int)chr; //will show the ancii code
chr = 232;
cout<<chr; //will show what ever 232 repesents
cout<<(int)chr; //will show the ancii code i.e 232
cout<<chr; //will show the char
cout<<(int)chr; //will show the ancii code
chr = 232;
cout<<chr; //will show what ever 232 repesents
cout<<(int)chr; //will show the ancii code i.e 232
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Newbie Poster
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Originally Posted by FireNet
char chr = 'a';
cout<<chr; //will show the char
cout<<(int)chr; //will show the ancii code
chr = 232;
cout<<chr; //will show what ever 232 repesents
cout<<(int)chr; //will show the ancii code i.e 232
So if i had a character array (string):
tempChar[10] = '44\0abcdefg';
How do I convert that string into the integer 44? I've tried:
anInt = (int)tempChar;
hoping that it would take the string up to the null character \0 and turn it into an int, but no dice. Any suggestions?
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Don't cast, use atoi.
High Plains Blogger #plains #lounge ## I, for one, welcome our new socialist overlords.
"Capitalism is the unequal distribution of wealth. Socialism is the equal distribution of poverty."
"Capitalism is the unequal distribution of wealth. Socialism is the equal distribution of poverty."
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