我有以下问题
假设我们有一个9*8矩阵
如果某个位置是某行中的最小值并且其列中的值最大,则称该矩阵具有"鞍点".在符号中,a [i] [j]是一个鞍点
a[i][j]=min a[i][k] ==max a[k][k]
1<=k<=8 1<=k<=9
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请帮我找到马鞍点的计算机位置.
做一个任务,我必须实现一些功能。其中一个函数是检查字符串是否为回文。
#include <stdio.h>
#include <stdlib.h>
char string[] = "cameron";
char string2[] = "mah";
char palindrome[] = "madam";
char notPalindrome[] = "music";
int removeChar(char *str1, char * str2, char c){
int length = 0;
for (int i = 0; str1[i] != '\0'; i++){
length++;
}
for (int i = 0; i <= length; i++){
if (str1[i] == c){
str2[i] = '*';
}
else {
str2[i] = str1[i];
}
}
for (int i = 0; i<= length; i++){
printf("%c", str2[i]);
}
} …Run Code Online (Sandbox Code Playgroud) 我有这段代码
#include <stdio.h>
typedef signed long long v2signed_long
__attribute__ ((__vector_size__ (sizeof(signed long long) * 2)));
int main()
{
v2signed_long v = {4611686018427387904LL, -9223372036854775808LL};
printf("%lli, %lli\n", v[0], v[1]);
return 0;
}
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这给出了以下警告(相关问题没有帮助):
:7:45: warning: integer literal is too large to be represented in
a signed integer type, interpreting as unsigned
[-Wimplicitly-unsigned-literal]
v2signed_long v = {4611686018427387904LL, -9223372036854775808LL};
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有没有办法解决这个警告?谢谢!
我写了这段代码:
// print.h
#pragma once
#ifdef __cplusplus
#include <string>
void print(double);
void print(std::string const&);
extern "C"
#endif
void print();
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以及源文件:
// print.cxx
#include "print.h"
#include <iostream>
void print(double x){
std::cout << x << '\n';
}
void print(std::string const& str){
std::cout << str << '\n';
}
void print(){
printf("Hi there from C function!");
}
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以及驱动程序:
// main.cxx
#include "print.h"
#include <iostream>
int main(){
print(5);
print("Hi there!");
print();
std::cout << '\n';
}
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当我编译时:
gcc -c print.cxx && g++ print.o main.cxx -o prog …Run Code Online (Sandbox Code Playgroud) 所以我正在学习如何在 C 中使用 while 和 for 循环,但这段代码似乎不起作用。scanf 语句似乎被忽略了,循环只是重复自己而不需要我输入“Y”来重复。这是代码:
void showCommission();
void main() {
char keepGoing='y';
while(keepGoing=='y') {
showCommission();
printf("Do you want to calculate another?\n");
scanf("%c",&keepGoing);
}
}
void showCommission() {
float sales,commission;
const float COM_RATE=0.10;
printf("Enter the amount of sales\n");
scanf("%f",&sales);
commission=sales*COM_RATE;
printf("The commission is $%f.\n",commission);
}
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这是运行代码给我的内容:
Enter the amount of sales
5000
The commission is $500.000000.
Do you want to calclulate another?
...Program finished with exit code 10
Press ENTER to exit console.
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它从不提示我输入 y 并且代码只是出于某种原因退出。
我有 :
typedef struct a{
int var;
}aa;
typedef struct b{
aa *a;
}bb;
int main()
{
bb *b;
b->a->var;
return 0;
}
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struct a嵌套在b. 如何初始化变量值var使用2指针这样的:
b->a->var;
?