scan a line with numbers and words and just keep the words in c

I have a text file that has listed albums and songs.
eg:

Pink Floyd : Dark Side of the Moon

0:01:30 - Speak to Me

0:02:43 - Breathe

0:03:36 - On the Run

0:04:36 - The Great Gig in the Sky

I am using sscanf to get the duration of each song. When I am trying to get the name of the song im just getting a blank page. How can I just discard all the other characters I don't want. So far for the duration I use this:

int temp1,temp2,temp3;
char str[100];
char symbol[2]="-";

FILE *fp;
fp = fopen("albums.txt","r");

if (fp == NULL) 
 printf("Error: unable to open ‘albums.txt’Report error.in mode ’r’n");
 exit(EXIT_FAILURE);
 


while (fgets(str, 100, fp) != NULL)

 if(strstr(str,symbol))
 
 sscanf(str,"%d:%d:%d",&temp1,&temp2,&temp3);
 getHour(temp1,temp2,temp3); //temp1:hours, temp2:minutes, temp3:seconds
 
 

fclose(fp);

asked Nov 11 at 18:13

T.ChD

363

add a comment |

I have a text file that has listed albums and songs.
eg:

Pink Floyd : Dark Side of the Moon

0:01:30 - Speak to Me

0:02:43 - Breathe

0:03:36 - On the Run

0:04:36 - The Great Gig in the Sky

int temp1,temp2,temp3;
char str[100];
char symbol[2]="-";

FILE *fp;
fp = fopen("albums.txt","r");

if (fp == NULL) 
 printf("Error: unable to open ‘albums.txt’Report error.in mode ’r’n");
 exit(EXIT_FAILURE);
 


while (fgets(str, 100, fp) != NULL)

 if(strstr(str,symbol))
 
 sscanf(str,"%d:%d:%d",&temp1,&temp2,&temp3);
 getHour(temp1,temp2,temp3); //temp1:hours, temp2:minutes, temp3:seconds
 
 

fclose(fp);

asked Nov 11 at 18:13

T.ChD

363

add a comment |

I have a text file that has listed albums and songs.
eg:

Pink Floyd : Dark Side of the Moon

0:01:30 - Speak to Me

0:02:43 - Breathe

0:03:36 - On the Run

0:04:36 - The Great Gig in the Sky

int temp1,temp2,temp3;
char str[100];
char symbol[2]="-";

FILE *fp;
fp = fopen("albums.txt","r");

if (fp == NULL) 
 printf("Error: unable to open ‘albums.txt’Report error.in mode ’r’n");
 exit(EXIT_FAILURE);
 


while (fgets(str, 100, fp) != NULL)

 if(strstr(str,symbol))
 
 sscanf(str,"%d:%d:%d",&temp1,&temp2,&temp3);
 getHour(temp1,temp2,temp3); //temp1:hours, temp2:minutes, temp3:seconds
 
 

fclose(fp);

asked Nov 11 at 18:13

T.ChD

363

I have a text file that has listed albums and songs.
eg:

Pink Floyd : Dark Side of the Moon

0:01:30 - Speak to Me

0:02:43 - Breathe

0:03:36 - On the Run

0:04:36 - The Great Gig in the Sky

int temp1,temp2,temp3;
char str[100];
char symbol[2]="-";

FILE *fp;
fp = fopen("albums.txt","r");

if (fp == NULL) 
 printf("Error: unable to open ‘albums.txt’Report error.in mode ’r’n");
 exit(EXIT_FAILURE);
 


while (fgets(str, 100, fp) != NULL)

 if(strstr(str,symbol))
 
 sscanf(str,"%d:%d:%d",&temp1,&temp2,&temp3);
 getHour(temp1,temp2,temp3); //temp1:hours, temp2:minutes, temp3:seconds
 
 

fclose(fp);

c file-io scanf text-files fgets

asked Nov 11 at 18:13

T.ChD

363

asked Nov 11 at 18:13

T.ChD

363

asked Nov 11 at 18:13

T.ChD

363

asked Nov 11 at 18:13

T.ChD

363

asked Nov 11 at 18:13

T.ChD

363

add a comment |

1 Answer
1

active

oldest

votes

Test the return value of sscanf() for success. Use "%*d" to scan an int, yet not save. Use "%[^n]" to scan and save all non-'n' characters.

Code can consume the ''-'` as part of the scan.

while (fgets(str, sizeof str, fp) != NULL) 
 char title[sizeof str]; // Wide enough for anything from `str`.
 if (sscanf(str, "%*d :%*d :%*d - %[^n]", title) == 1) 
 // success
 printf("<%s>n", title);

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

add a comment |

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1 Answer
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1 Answer
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active

oldest

votes

Test the return value of sscanf() for success. Use "%*d" to scan an int, yet not save. Use "%[^n]" to scan and save all non-'n' characters.

Code can consume the ''-'` as part of the scan.

while (fgets(str, sizeof str, fp) != NULL) 
 char title[sizeof str]; // Wide enough for anything from `str`.
 if (sscanf(str, "%*d :%*d :%*d - %[^n]", title) == 1) 
 // success
 printf("<%s>n", title);

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

add a comment |

Test the return value of sscanf() for success. Use "%*d" to scan an int, yet not save. Use "%[^n]" to scan and save all non-'n' characters.

Code can consume the ''-'` as part of the scan.

while (fgets(str, sizeof str, fp) != NULL) 
 char title[sizeof str]; // Wide enough for anything from `str`.
 if (sscanf(str, "%*d :%*d :%*d - %[^n]", title) == 1) 
 // success
 printf("<%s>n", title);

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

add a comment |

Test the return value of sscanf() for success. Use "%*d" to scan an int, yet not save. Use "%[^n]" to scan and save all non-'n' characters.

Code can consume the ''-'` as part of the scan.

while (fgets(str, sizeof str, fp) != NULL) 
 char title[sizeof str]; // Wide enough for anything from `str`.
 if (sscanf(str, "%*d :%*d :%*d - %[^n]", title) == 1) 
 // success
 printf("<%s>n", title);

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

Test the return value of sscanf() for success. Use "%*d" to scan an int, yet not save. Use "%[^n]" to scan and save all non-'n' characters.

Code can consume the ''-'` as part of the scan.

while (fgets(str, sizeof str, fp) != NULL) 
 char title[sizeof str]; // Wide enough for anything from `str`.
 if (sscanf(str, "%*d :%*d :%*d - %[^n]", title) == 1) 
 // success
 printf("<%s>n", title);

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

edited Nov 11 at 20:30

answered Nov 11 at 20:26

chux

80.3k870147

answered Nov 11 at 20:26

chux

80.3k870147

answered Nov 11 at 20:26

chux

80.3k870147

add a comment |

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