Itoa function in C language converts int data type to string data type. Syntax for itoa function is char. itoa ( int value, char. str, int base ). 2) First convert integer part to string. 3) Extract fraction part by exacted integer part from n. 4) If d is non-zero, then do following.a) Convert fraction part to integer by multiplying it with pow(10, d).b) Convert the integer value to string and append to the result. Following is C implementation of the above approach.
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Write a C function ftoa() that converts a given floating point number to string. Use of standard library functions for direct conversion is not allowed. The following is prototype of ftoa().
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A simple way is to use sprintf(), but use of standard library functions for direct conversion is not allowed.
The idea is to separate integral and fractional parts and convert them to strings separately. Following are the detailed steps.
1) Extract integer part from floating point.
2) First convert integer part to string.
3) Extract fraction part by exacted integer part from n.
4) If d is non-zero, then do following.
….a) Convert fraction part to integer by multiplying it with pow(10, d)
….b) Convert the integer value to string and append to the result.
The idea is to separate integral and fractional parts and convert them to strings separately. Following are the detailed steps.
1) Extract integer part from floating point.
2) First convert integer part to string.
3) Extract fraction part by exacted integer part from n.
4) If d is non-zero, then do following.
….a) Convert fraction part to integer by multiplying it with pow(10, d)
….b) Convert the integer value to string and append to the result.
Following is C implementation of the above approach.
#include<stdio.h>
void reverse( char *str, int len)
int i=0, j=len-1, temp;
{
str[i] = str[j];
i++; j--;
}
// Converts a given integer x to string str[]. d is the number
// of digits required in output. If d is more than the number
// of digits in x, then 0s are added at the beginning.
{
while (x)
str[i++] = (x%10) + '0' ;
}
// If number of digits required is more, then
while (i < d)
str[i] = ' ;
}
// Converts a floating point number to string.
{
int ipart = ( int )n;
// Extract floating part
int i = intToStr(ipart, res, 0);
// check for display option after point
{
// Get the value of fraction part upto given no.
// of points after dot. The third parameter is needed
fpart = fpart * pow (10, afterpoint);
intToStr(( int )fpart, res + i + 1, afterpoint);
}
// driver program to test above funtion
{
float n = 233.007;
printf ( '%s' , res);
}
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Output:
Convert Int To String C++
![Convert int to string c++ Convert int to string c++](/uploads/1/2/6/0/126089852/548269913.png)
We use g++ compiler to turn provided C code into assembly language. To see the assembly code generated by the C compiler, we can use the “-S” option on the command line:
Syntax:
Syntax:
This will cause gcc to run the compiler, generating an assembly file. Suppose we write a C code and store it in a file name “geeks.c” .
To Convert Int To String In C++
#include <stdio.h>
// global string
int main()
// Declaring variables
printf ( '%s %d' , s, a+b);
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Running the command:
This will cause gcc to run the compiler, generating an assembly file geeks.s, and go no further. (Normally it would then invoke the assembler to generate an object- code file.)
The assembly-code file contains various declarations including the set of lines:
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.section __TEXT, __text, regular, pure_instructions
.globl _main
_main: ## @main
## BB#0:
Ltmp0:
Ltmp1:
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
leaq L_.str(%rip), %rdi
movl $2000, -4(%rbp) ## imm = 0x7D0
movl -4(%rbp), %eax
movl %eax, %edx
callq _printf
movl %eax, -12(%rbp) ## 4-byte Spill
addq $16, %rsp
retq
.globl _s ## @s
.asciz 'GeeksforGeeks'
.section __TEXT, __cstring, cstring_literals
.asciz '%s %d'
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Convert Int To String Visual Basic
![String String](/uploads/1/2/6/0/126089852/354893576.png)
Each indented line in the above code corresponds to a single machine instruction. For example, the pushq instruction indicates that the contents of register %rbp should be pushed onto the program stack. All information about local variable names or data types has been stripped away. We still see a reference to the global
variable s[]= “GeeksforGeeks”, since the compiler has not yet determined where in memory this variable will be stored.
variable s[]= “GeeksforGeeks”, since the compiler has not yet determined where in memory this variable will be stored.
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