我正在尝试找出该程序无法运行的原因。它应该执行类似的操作
5 * 4 = 20 4 + 2 * 8 = 20 6/3 - 2 = 0。
但是,事情并不顺利。
说明是:
Write a C program called calculate that performs simple arithmetic operations. The program takes 3 or 5 arguments from the command line.
我不知道现在该怎么办。
int calc(int x, char op, int y) {
if (op == '+') {
return (x+y);
}
if (op == '-') {
return (x-y);
}
if (op == 't') {
return (x*y);
}
if (op == '/') {
return (x/y);
}
}
int main(int argc, char *argv[]) {
int a,b,c,result,doOp;
char op1, op2;
if (argc == 4 || argc == 6) {
a = atoi(argv[1]);
b = atoi(argv[3]);
op1 = *argv[2];
} else {
printf("Wrong number of arguments!");
return 0;
}
if (argc == 6) {
c = atoi(argv[5]);
op2 = *argv[4];
if ((op1 == '+' || op1 == '-') && (op2 == '/' || op2 == 't')) {
result = calc(a, op1, calc(b, op2, c));
printf("%d", result);
}
if ((op2 == '+' || op2 == '-') && (op1 == '/' || op1 == 't')) {
result = calc((calc(a, op1, b)), op2, c);
printf("%d", result);
} else {
result = calc((calc(a, op1, b)), op2, c);
printf("%d", result);
}
}
if (argc == 4) {
result = calc(a, op1, b);
printf("%d", result);
}
return 0;
}
最佳答案
给你阿里雷扎。 问题有几个,但主要的一个是您检查中缺少“else”以查看要使用哪个计算器排序。
int calc(int x, char op, int y) {
if (op == '+') {
return (x+y);
}
if (op == '-') {
return (x-y);
}
if (op == 't') {
return (x*y);
}
if (op == '/') {
return (x/y);
}
printf("Unknown operator!"); // added error check
}
int main(int argc, char *argv[]) {
int a,b,c,result,doOp;
char op1, op2;
if (argc == 4 || argc == 6) {
a = atoi(argv[1]);
b = atoi(argv[3]);
op1 = *argv[2];
} else {
printf("Wrong number of arguments!");
return 0;
}
if (argc == 6) {
c = atoi(argv[5]);
op2 = *argv[4];
if ((op1 == '+' || op1 == '-') && (op2 == '/' || op2 == 't')) {
result = calc(a, op1, calc(b, op2, c));
printf("%d", result);
}
// added else if
else if ((op2 == '+' || op2 == '-') && (op1 == '/' || op1 == 't')) {
result = calc((calc(a, op1, b)), op2, c);
printf("%d", result);
}
else {
result = calc((calc(a, op1, b)), op2, c);
printf("%d", result);
}
}
if (argc == 4) {
result = calc(a, op1, b);
printf("%d", result);
}
return 0;
}
关于计算器程序问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59144970/