Fscanf returns -1
Webfscanf returns EOF if end of file (or an input error) occurs before any values are stored. If values are stored, it returns the number of items stored; that is, the number of times a … Webfscanf type specifiers. type. Qualifying Input. Type of argument. c. Single character: Reads the next character. If a width different from 1 is specified, the function reads width …
Fscanf returns -1
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WebA = fscanf (fileID,formatSpec) reads data from an open text file into column vector A and interprets values in the file according to the format specified by formatSpec . The fscanf … WebJun 23, 2016 · I have a problem with fscanf and cl.exe version 19.00.23026 in Microsoft Visual C++. The return value of statement "fscanf(fp,"\n")" at the end of a file where only a "\n" is left, seems to be -1 for a cpp file compiled by cl.exe version 19.00.23026. However, the return value is 0 when the cpp ... · On 6/22/2016 9:30 AM, britpopkid wrote: I have a ...
http://haodro.com/archives/14057 WebSep 24, 2024 · The first condition is true only when fscanf returns 1, which means 1 pattern was matched. The second condition is true if fscanf returns any value other than 0. So a return value of 2 for example would stay in the loop. That won't be returned because there is only one pattern, but what could be returned is -1, and it will be returned when you ...
WebJul 28, 2013 · The fscanf function returns the value of the macro EOF if an input failure occurs before the first conversion (if any) has completed. Otherwise, the function returns the number of input items assigned, which can be fewer than provided for, or even zero, in the event of an early matching failure. WebFeb 14, 2024 · fscanf reads from a file pointed by the FILE pointer (ptr), instead of reading from the input stream. Return Value: It returns zero, if unsuccessful. Otherwise, it …
WebThe fscanf() function returns the number of fields that it successfully converted and assigned. The return value does not include fields that the fscanf() function read but did …
WebMar 13, 2024 · "); return -1; } while (fgets (line, MAX_LEN, fp) != NULL) { char *token = strtok (line, ","); while (token != NULL) { data [i] [j++] = atoi (token); token = strtok (NULL, ","); } i++; j = 0; } fclose (fp); for (i = 0; i < 10; i++) { for (j = 0; j < 10; j++) { printf ("%d ", data [i] [j]); } printf ("\n"); } return 0; } ``` … fact teams amsterdamfact team yuliusWebApr 9, 2024 · If the file doesn't exist for example, fopen will return a null pointer - fscanf will then try to read from the memory pointed to by file, but since it's a null pointer there's no memory there - that's an invalid read. And this is the cause for the SIGSEGV (actually the name of the signal emitted when a segmentation fault occurs). fact teamsWebNov 2, 2024 · What this will do is return if the fscanf failed to read in an integer (it returns the number of items scanned). So, at that point, the function will return (a). If you get a … fact team pro personaWebFeb 20, 2016 · As stated here, scanf returns the number of receiving arguments successfully assigned, or EOF if read failure occurs before the first receiving argument was assigned. In your example it returns -1 (EOF in most environments) so it doesn't change the value of version ( 0) and that explains the "incorrect" print. fact teams westWebfscanf () Return value. If successful, the fscanf () function returns the number of receiving arguments successfully assigned. If a matching failure occurs before the first receiving … fact team zutphenWebfscanf函数是干嘛的. fscanf 是系统里的函数，用于从 文本文件 用有格式 方法 读入数据。 例如： char str; int n; float a; fact team soest