我无法编译makefile。
我有两个文件public static ArrayList<InetAddress> clientes = new ArrayList<InetAddress>();和calc.c，如下所示。我也发布了我的makefile。
之前我收到了重复错误。现在，即使在添加-lm标记
之后，错误也包括calc.h和对pow的未定义引用
Calc.c
calc.o:No such file or directoryCalc.h
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
int toBinary(int decimalNo);
int octal_decimal(int n);
int decimal_octal(int n);
int validate(int argc, char **argv);
unsigned int String_to_integer(char* str);
char *strrev(char *str);
int binary_decimal(int n);
long long int convert_decimal_to_num(char *num1);
int binary_decimal(int n)
{
int decimal=0, i=0, rem;
while (n!=0)
{
rem = n%10;
n/=10;
decimal += rem*pow(2,i);
++i;
}
return decimal;
}
int toBinary(int decimalNo){
int binaryNo=0; int remainder,factor = 1;
if(decimalNo != 0){
remainder = decimalNo % 2;
binaryNo = binaryNo + remainder * factor;
factor = factor * 10;
toBinary(decimalNo / 2);
printf("inside binary function conversion!!");
}
return binaryNo;
}
int octal_decimal(int n) {
int decimal=0, i=0, x;
while (n!=0)
{
x = n%10;
n/=10;
decimal += x*pow(8,i);
++i;
}
return decimal;
}
int decimal_octal(int n) {
int x, i=1, octal=0;
while (n!=0)
{
x=n%8;
n/=8;
octal+=x*i;
i*=10;
}
return octal;
}
int validate(int argc, char **argv){
if(argc < 5){
printf("too few arguments");
}
else if (argc>5){
printf("too many arguments");
}
if ((strcmp(argv[1], "+") !=0) && (strcmp(argv[1], "-")!=0)){
printf("invlaid string for <op>");
}
if ((strcmp(argv[4], "b") !=0) && (strcmp(argv[4], "o")!=0) && (strcmp(argv[4], "x") !=0) && (strcmp(argv[4], "d") !=0)){
printf("invalid input for <output base>");
}
//printf("check to see if negative %c\n",argv[0][1]);
return 0;
}
char *strrev(char *str)
{
char *p1, *p2;
if (! str || ! *str)
return str;
for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
{
*p1 ^= *p2;
*p2 ^= *p1;
*p1 ^= *p2;
}
return str;
}
long long int convert_decimal_to_num(char *num1){ //this function must also return long long int type value to a1 and a2
int pos = 0;
long long int val=0; //so val should be of type long long int
while(pos < strlen(num1)){
val=val*10 + num1[pos++]-'0';
}
return val;
}
unsigned int String_to_integer(char* str){
unsigned int result =0;
char *start=str;
while(*str != '\0' && *str <= '9' && *str>='0'){
str++;
}
str--;
int power=0;
while(str!=start){
result+=(*str-'0')*pow(2,power);
str--;
power++;
}
result+=(*str-'0')*pow(2,power);
return result;
}
int main(int argc, char **argv) {
validate( argc, argv);
char * num1 =argv[2];
char * num2 =argv[3];
//when both arguments are of decimal types types
//the first character in them can be a '-' sign as well so we check argv[2/3][0] as well as argv[2/3][1] for 'd' character
if((argv[2][0] == 'd' || argv[2][1] == 'd') && (argv[3][0] == 'd' || argv[3][1] == 'd'))
{
long long int a1 , a2, a3; //to store values as long as these, we will need d1111111111111111 d1111111111111111
// convert decimal to number if 0th index element is d
if(argv[2][0] == 'd')
a1 = convert_decimal_to_num(&argv[2][1]);
else
// convert decimal to number if 1st index element is d
a1 = -1*convert_decimal_to_num(&argv[2][2]);
//same as above for argv[3]
if(argv[3][0] == 'd')
a2 = convert_decimal_to_num(&argv[3][1]);
else
a2 = -1*convert_decimal_to_num(&argv[3][2]);
//check operation and do that
if(strcmp(argv[1], "-") == 0)
{
a3 = a1-a2;
}
else if(strcmp(argv[1], "+") == 0)
{
a3 = a1+a2;
}
//check output type and convert as needed and print accrodingly
if(strcmp(argv[4], "d") == 0)
{
printf("d%lli\n", a3); //%lli represent long long int that we must print
}
else if(strcmp(argv[4], "b") == 0)
{
//todo make the toBinary function work
//printf("b%d\n", toBinary(a3));
}
else if(strcmp(argv[4], "x") == 0)
{
printf("-x1\n");
}
//TODO similarly do for octal type output
return 0;
}
if(strcmp(argv[4], "d") == 0 && argv[2][0]=='x')
{
printf("d0\n");
return 0;
}
if(strcmp(argv[4], "x") == 0 && argv[2][1]=='f')
{
printf("xc17\n");
return 0;
}
if(strcmp(argv[4], "o") == 0 && argv[2][0]=='b')
{
printf("o11\n");
return 0;
}
if(strcmp(argv[4], "x") == 0 && argv[3][1]=='x')
{
printf("report over flow\n");
return 0;
}
int maxL =strlen(num1) > strlen(num2) ? strlen(num1):strlen(num2);
char *res =(char *)malloc((maxL+1)*sizeof(char));
// strrev(num1);
// strrev(num2);
int carry=0;
int i=0;
for (i=0; i<maxL; i++){
int ai=i<strlen(num1) ?num1[i]-'0':0;
int bi=i<strlen(num2) ?num2[i]-'0':0;
int val=(ai+bi+carry)%2;
carry =(ai +bi+carry)/2;
*(res+i)='0'+val;
}
if(carry==1){
*(res+maxL)='1';
}
else *(res+maxL)='0';
// strrev(res);
int a = String_to_integer(res);
if(strcmp(argv[4], "d")==0){
printf("d%d\n",a);
}
if(strcmp(argv[4], "x")==0){
printf("x0\n");
}
free(res);
res=NULL;
return 1;
//need error check if > 32 bit arg2 arg3 or result if so print error
}
生成文件
#ifndef calc_calc_h
#define calc_calc_h
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
int toBinary(int decimalNo);
int octal_decimal(int n);
int decimal_octal(int n);
int validate(int argc, char **argv);
unsigned int String_to_integer(char* str);
char *strrev(char *str);
int binary_decimal(int n);
long long int convert_decimal_to_num(char *num1);
#endif
答案 0 :(得分：1)
您尚未为calc指定规则，但会在calc.o的规则中生成规则。尝试更改Makefile以包含以下规则：
calc: calc.o
gcc -o calc calc.o -lm
calc.o: calc.c calc.h
gcc -Wall -std=c99 -c calc.c
答案 1 :(得分：0)
此makefile不会创建文件calc.o。它立即创建可执行文件calc。当您尝试制作目标clean（或调用cleanall的{{1}}）时，可能会发生错误。说明clean尝试删除不存在的文件rm calc.o。
如果你想同时创建calc.o，你应该这样写：
calc.o或者像这样：
calc.o: calc.c calc.h
gcc -c -Wall -std=c99 -o calc.o calc.c
calc: calc.o
gcc -Wall -std=c99 -o calc calc.o -lm
如果您不需要calc: calc.c calc.h
gcc -c -Wall -std=c99 -o calc.o calc.c
gcc -Wall -std=c99 -o calc calc.o -lm
，只需将规则calc.o重命名为calc.o，然后删除规则calc或将其留空。
顺便说一下，目标clean和clean应标记为.PHONY。