Printf Prototype Error
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Function Should Return A Value
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Prototype Of Printf And Scanf In C
following 3 answers 3 Report Abuse Are you sure you want to delete this answer? Yes No Sorry, something has gone wrong. Trending Now Ivanka Trump Bob Dylan Jane Fonda Bruno Mars 2016 Crossovers Auto Insurance Quotes Annie Schmidt Houston Texans Dating Sites Conan O'Brien Answers Relevance Rating Newest Oldest Best Answer: printf(); should have a prototype. its an error message given by C compiler. it means that the compiler doesnt know the definition of the statement printf(); the compiler usually gets the definition of statements from the header files.(file that ends with .h) printf() has its prototype in stdio.h , a header file that is used for standard input and output. if compiler says that printf() doesnt have a prototype, that means u havent included the stdio.h file. try this program. #include
help? Post your question and get tips & solutions from a community of 418,620 IT Pros & Developers. It's quick & easy. Error: printf statement should contain prototype P: 13 prototype of scanf in c goutham1 hai can any body help me iam starting my c programming. i started prototype for printf in turbo c my basic programme that is adding two numbers when i compiled my programme in cpp in the print f statement it
If We Will Take A Void*p And Int*q And We Write Q=p. Then What Will Be The Output In C And C++
is telling printf statement should contain prototype can any body please help me May 13 '07 #1 Post Reply Share this Question 4 Replies 100+ P: 1,806 DeMan assuming you are including stdio.h, it sounds https://answers.yahoo.com/question/index?qid=20080216145112AAMSeqV like you have a slight syntax error (specifically the way you are trying to display the output is not quite correct. It should probably look something like this (I am assuming integer addition here) Expand|Select|Wrap|Line Numbers printf("Sumof%dand%dis%d",a,b,(a+b)); May 13 '07 #2 reply P: 13 goutham1 assuming you are including stdio.h, it sounds like you have a slight syntax error (specifically the way you are trying to display the output https://bytes.com/topic/c/answers/646095-error-printf-statement-should-contain-prototype is not quite correct. It should probably look something like this (I am assuming integer addition here) Expand|Select|Wrap|Line Numbers printf("Sumof%dand%dis%d",a,b,(a+b)); my programme is like this main( ) { int a,b,c; a=5;b=6; c=a+b; printf("%d",c); } ihad changed it and seen the programme but the same error it is sowing please help me again it shows the msg like printf should have a prototype. May 14 '07 #3 reply Expert 2.5K+ P: 3,652 Ganon11 You are probably not including the proper header file. Before you type main(), type the following line: Expand|Select|Wrap|Line Numbers #include
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss http://stackoverflow.com/questions/8161203/missing-prototype-error the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow http://pubs.opengroup.org/onlinepubs/009695399/functions/fprintf.html Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping in c each other. Join them; it only takes a minute: Sign up missing prototype error up vote 2 down vote favorite I'm getting an error I don't understand and can't find a solution. The error is as follows: missing prototype for isANumber the code it refers to is: double prompt(char *promptString) { printf("%s", promptString); char *input = ""; scanf("%s", prototype error in &*input); printf("%s\n", &*input); int check = isANumber(input); if (check) { return (double) *input; } else { return 0.00; } } int isANumber(char *check) { int result = 0; /* Current isdigit() return value */ do /* Check that each character of the...*/ result = isdigit(*check++); /* ...string is a digit and move on...*/ while (result && *check); /* ...until non-digit found or at EOS */ return result; /* Return result of last isdigit() call */ } libraries included: #include
print formatted output SYNOPSIS #include <stdio.h>
int fprintf(FILE *restrict stream, const char *restrict format, ...);
int printf(const char *restrict format, ...);
int snprintf(char *restrict s, size_t n,
const char *restrict format, ...);
int sprintf(char *restrict s, const char *restrict format, ...);
DESCRIPTION [CX] The functionality described on this reference page is aligned with the ISOC standard. Any conflict between the requirements described here and the ISOC standard is unintentional. This volume of IEEEStd1003.1-2001 defers to the ISOC standard. The fprintf() function shall place output on the named output stream. The printf() function shall place output on the standard output stream stdout. The sprintf() function shall place output followed by the null byte, '\0', in consecutive bytes starting at *s; it is the user's responsibility to ensure that enough space is available. The snprintf() function shall be equivalent to sprintf(), with the addition of the n argument which states the size of the buffer referred to by s. If n is zero, nothing shall be written and s may be a null pointer. Otherwise, output bytes beyond the n-1st shall be discarded instead of being written to the array, and a null byte is written at the end of the bytes actually written into the array. If copying takes place between objects that overlap as a result of a call to sprintf() or snprintf(), the results are undefined. Each of these functions converts, formats, and prints its arguments under control of the format. The format is a character string, beginning and ending in its initial shift state, if any. The format is composed of zero or more directives: ordinary characters, which are simply copied to the output stream, and convers