C语⾔实现int转换string
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int string2int(const char * string)
{
int value = 0;
int index = 0;
for(;string[index] >= '0' && string[index] <= '9'; index ++)
{
value = value * 10 + string[index] - '0';
}
return value;
}
int string_reverse(char * strSrc)
{
int len = 0;
int i = 0;
char * output = NULL;
char * pstr = strSrc;
while(* pstr)
{
pstr++;
len++;
}
output = (char *)malloc(len);
if(output == NULL)
{
perror("malloc");
return -1;
}
for(i = 0; i < len ;i++)
{
c++string类型
output[i] = strSrc[len - i -1];
printf("output[%d] = %c\n",len - i -1,strSrc[len - i - 1]);
}
output[len] = '\0';
strcpy(strSrc, output);
return0;
}
int  int2string(int value, char * output)
{
int index = 0;
if(value == 0)
{
output[0] = value + '0';
return1;
}
else
{
while(value)
{
output[index] = value % 10 + '0';
index ++;
value /= 10;
}
string_reverse(output);
return1;
}
}
int main()
int main()
{
#if 0
char string[12] = "1234";
int value = string2int(string);
printf("value = %d\n", value);
#endif
char string[128] = {0};
int value  = 123;
int2string(value, string);
printf("int_to_string=============:%s\n",string);
return0;
}
代码运⾏结果为：

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