Created
September 17, 2013 02:44
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convert long long to string in C
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| #include<stdio.h> | |
| #include<string.h> | |
| #include<stdlib.h> | |
| char* strfromlonglong(long long value){ | |
| char buf[32], *p; | |
| unsigned long long v; | |
| v = (value < 0) ? -value: value; | |
| p = buf + 31; | |
| do{ | |
| *p -- = '0' + (v%10); | |
| v /= 10; | |
| } while(v); | |
| if(value < 0) *p -- = '-'; | |
| p ++; | |
| int len = 32 - (p - buf); | |
| char *s = (char*)malloc(sizeof(char) * (len + 1)); | |
| memcpy(s, p, len); | |
| s[len] = '\0'; | |
| return s; | |
| } | |
| int main() | |
| { | |
| long long value; | |
| char *r; | |
| value = 5201214; | |
| r = strfromlonglong(value); | |
| printf("%s\n", r); | |
| value = -5201214; | |
| r = strfromlonglong(value); | |
| printf("%s\n", r); | |
| } |
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