之前在用labwindows/cvi编写上位机，在这里记录一下过程中用到的字符串与整型互转方法。

1.字符串转整型 

#include <stdio.h>//字符串转整型
int str2int(const char* str)
{int temp = 0;const char* p = str;if(str == NULL) return 0;if(*str == '-' || *str == '+'){str ++;}while( *str != 0){if( *str < '0' || *str > '9'){break;}temp = temp*10 +(*str -'0');str ++;}if(*p == '-'){temp = -temp;}return temp;
}

2.整型转字符串

整型转字符串是用到了C语言提供的函数spintf()

int main(int argc,char **argv)
{int i = -11100;char string[20] = {0};sprintf(string,"%d",i);printf("%s",string);getchar();
}