Question

怎样用c语言编写将字符串转换为整数的函数

怎样用c语言编写将字符串转换为整数的函数

Answer 1

int tem;
for(i=0;i<字符串有效长度;i++)
{tem=s[i]-'0';
然后把tem保存到什么地方
}

Answer 2

tem=0;
for(i=0;i<strlen(s);i++)
tem=tem*10+s[i]-'0';
核心就这三句

Answer 3

void ChangeAllParameterDataByModBus(float parameterData[], unsigned char ModDataBack[], unsigned short num)
{
int i;
char singleStr[5] = {'\0','\0','\0','\0','\0'};
float *pf;
float dataf = 0;
int len = 4;

pf = &dataf;

for(i = 0; i < num; i ++)
{
singleStr[0] = ModDataBack[i * 4 + 3];
singleStr[1] = ModDataBack[i * 4 + 2];
singleStr[2] = ModDataBack[i * 4 + 1];
singleStr[3] = ModDataBack[i * 4 ];
singleStr[4] = '\0';
memcpy(pf, singleStr, len);
parameterData[i] = *pf;
/* Print("%-6.2f\t", parameterData[i]); /*test*/
}

Answer 4

atoi()