format-string

I would like to format an integer as a percent without it multiplying by 100 as shown here . Because my source is an int, dividing it first by 100 is not a valid option. Is this possible? [DisplayFormat(DataFormatString = "{0:#%}")] You can escape the % character: [DisplayFormat(DataFormatString = @"{0:#\%}")] Note that there are two ways to use \ as an escape character: if you prefix a string literal with the verbatim symbol ( @ ), then \ characters are included in the string as-is, which means that as part of a format string a single \ will function as an escape character. Without the @

I want to print out a variable of type size_t in C but it appears that size_t is aliased to different variable types on different architectures. For example, on one machine (64-bit) the following code does not throw any warnings: size_t size = 1; printf("the size is %ld", size); but on my other machine (32-bit) the above code produces the following warning message: warning: format '%ld' expects type 'long int *', but argument 3 has type 'size_t *' I suspect this is due to the difference in pointer size, so that on my 64-bit machine size_t is aliased to a long int ( "%ld" ), whereas on my 32

I was reading about vulnerabilities in code and came across this Format-String Vulnerability . Wikipedia says: Format string bugs most commonly appear when a programmer wishes to print a string containing user supplied data. The programmer may mistakenly write printf(buffer) instead of printf("%s", buffer). The first version interprets buffer as a format string, and parses any formatting instructions it may contain. The second version simply prints a string to the screen, as the programmer intended. I got the problem with printf(buffer) version, but I still didn't get how this vulnerability