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It is standard on functions to provide some indication that the function has succeeded in its operation. Consider the Scanf function:
scanf("%d",&number1); If the function does indeed get a integer from the keyboard then everything is okay, but what happens if the user types in a char or float etc. The program might crash, it is common to write functions which never crash but return an error code. On the function scanf, the full prototype is
int scanf("format",&variables); The int is used to provide details of correct operation i.e. number of values input or '-1' error . We can use this in programs to trap errors and repeat functions etc. The appended ANSI library shows full prototypes and meaning of return values from functions.
(a) Write a recursive procedure (digits n) that computes the number of digits in the integer n using a linear recursive process. For example, (digits 42) should return 2 and (digit
Unions A union is also like a structure, except that only single variable in the union is stored in the allocated memory at a time. It is a collection of mutually exclusive var
#include #include #include void* memorycopy (void *des, const void *src, size_t count) { size_t n = (count + 7) / 8; char* destination = (char *) des; char* source =
c program to construct a structure: struct sensus { char name[30]; long int population;
Relational Operators A relational operator is used to make comparison among two values. All these operators are binary and needs two operands. There are the following relationa
what is virtual datatype
flow chart of volume of sphere
C Program for Palindrome Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
Program is to replace every occurrence of in a string: Program is to replace every occurrence of c1 in string with c2 and have function return the no. of replacement int re
Program is to append the contents of one file to another: void main() { clrscr(); fstream file1,file2; char st1[13],st2[13];/* 13 because a filename canno
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